:A Certain Magical Index

{{See also|List of A Certain Magical Index characters{{!}}List of A Certain Magical Index characters}}

A Certain Magical Index is set in a world where supernatural abilities are a reality. Individuals who possess special powers acquired via science are called {{Nihongo|Espers|超能力者|Chōnōryokusha}}. Those Espers who gain their abilities without the aid of special scientific instruments, whether at birth or otherwise, are referred to as {{Nihongo|Gemstones|原石|Genseki}}. Others, known as {{Nihongo|Sorcerers|魔術師|Majutsushi}}, gain their powers upon mastering the power of magic, either from obtaining knowledge from different mythologies or by using mystical artifacts, although the existence of sorcerers is a secret to the public. While Sorcerers align themselves with different beliefs, Espers are aligned with scientific institutions. This leads to a power struggle between the magic and science factions for control of the world.

The story is set in {{Nihongo|Academy City|学園都市|Gakuen Toshi}}, a technologically advanced independent city-state located in the west of Tokyo, Japan, which is known for its educational and research institutions. Toma Kamijo is a student in Academy City whose right hand's power called the Imagine Breaker could negate any supernatural powers but also his luck, much to his chagrin. One day, Toma meets a young English girl named Index, a nun from Necessarius, a secret magic branch of the Church of England, whose mind had been implanted with the Index Librorum Prohibitorum – 103,000 forbidden magical books the Church stored in secret locations. His encounter with her leads him to meet others from the secret worlds of science and magic. Toma's unusual power places him at the center of conflicts between the Sorcerers and Espers in Academy City who planned to unravel the secrets behind Academy City, Index, and Toma's special power.

Besides its manga adaptation, the series also has spin-offs focusing on the level 5 espers, the top ranked espers in Academy city. One of them is A Certain Scientific Railgun, which focuses on Mikoto Misaka, an Electromaster and the third most powerful Esper in Academy City. The second, A Certain Scientific Accelerator, focuses on Accelerator, a teenager capable of controlling vectors and the most powerful Esper in Academy City. The third, A Certain Scientific Dark Matter, deals with the second most powerful Esper in Academy City named Teitoku Kakine and his past. The fourth, A Certain Scientific Mental Out, follows the fifth Level 5 Esper and most powerful psychological psychic named Misaki Shokuhō in her election campaign for the next president of Tokiwadai Middle School's student body.

Kazuma Kamachi started his work with A Certain Magical Index when he received a call from Kazuma Miki, the light novel editor, after his submission was rejected at the 9th Dengeki Game Novel Prize (now Dengeki Novel Prize) in 2002.{{cite book|last=Kamachi |first=Kazuma|author-link=Kazuma Kamachi |title=Toaru Majutsu no Indekkusu no Subete |date=September 2007|script-title=ja:とある魔術の禁書目録 (インデックス) ノ全テ |language=Japanese |publisher=ASCII Media Works |publication-date=September 21, 2007 |isbn=978-4-8402-4042-0}} Miki began to train him in writing multiple test novels, including a story about a girl sister and a boy with a mysterious arm which became the basis for his light novel.{{cite news |date=January 2, 2011 |script-title=ja:とある魔術の禁書目録：電撃史上最高1000万部突破 大ヒットの秘密は？ |trans-title=A Certain Magical Index: Dengeki's Highest Ever 10 Million Copies Sold. What's the secret behind the huge hit? |url=https://mantan-web.jp/article/20101231dog00m200019000c.html |language=Japanese |work=Mantan Web |access-date=June 11, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610232924/https://mantan-web.jp/article/20101231dog00m200019000c.html |url-status=live }}

In his essay titled "If It's Interesting Anything Goes: 600 Million Copies Printed—The Day in the Life of a Certain Editor", Miki stated that the light novel was originally called {{Nihongo|Last Memory|ラストメモリー|Rasuto Memorī}} but he chose the current title because the word "Index" left a "strong personality in the sense and direction" upon his reading of the manuscript.{{cite book |last=Miki |first=Kazuma |year=2015 |author-link=Kazuma Miki |script-title=ja:面白ければなんでもあり 発行累計6000万部——とある編集の仕事目録（ライフワーク） |trans-title=If It's Interesting Anything Goes: 600 Million Copies Printed—The Day in the Life of a Certain Editor |url=http://amwbooks.asciimw.jp/trial/978-4-04-865715-0/C5-03/ |language=Japanese |publisher=ASCII Media Works |publication-date=December 9, 2015 |isbn=978-4-04-865715-0 |access-date=June 11, 2021 |archive-date=November 1, 2020 |archive-url=https://web.archive.org/web/20201101114842/http://amwbooks.asciimw.jp/trial/978-4-04-865715-0/C5-03/ |url-status=live }} Kamachi revealed that Index's name was derived from the {{Nihongo|"Kinsho Mokuroku"|禁書目録}} kanji he found from looking in the encyclopedia since he wanted a name that would "stand out for the character the story was centered around".{{cite book |last=Kamachi |first=Kazuma |date=October 2009 |author-link=Kazuma Kamachi |script-title=ja:とある魔術の禁書目録 コミックガイド 5.5 |trans-title=A Certain Magical Index Comic Guide 5.5 |language=Japanese |publisher=Square Enix |publication-date=October 27, 2009 |isbn=978-4-7575-2675-4}} He avoided using difficult kanji for Toma Kamijo's name to help readers able to read it but he kept the meaning behind the character's epithet ("The One Who Purifies God and Slays Demons") a secret for now.

When it came the time to write the story, Kamachi investigated the terms "sorcerer" and "real" online for him to build the world of magic and the magicians' existence in his light novel.{{cite book |last=Kamachi |first=Kazuma |author-link=Kazuma Kamachi |chapter=Afterword |title=A Certain Magical Index |date=November 18, 2014 |volume=1 |publisher=Yen Press |publication-date=November 18, 2014 |pages=213–214 |isbn=978-0-316-33912-4}} He also realized that most other Dengeki Bunko novels had magic as a main theme; however, none of them actually invested much into its inner-workings. As such, he decided to use this as the premise for the series. In setting up the world of science, Kamachi "needed some kind of power to oppose" the magic side. This helped him to create the idea of Toma Kamijo's known power, the Imagine Breaker, and set the stage for the world-building of Academy City "where science, espers, and magic would gather".

Upon the release of the first volume of the light novel, Miki stated that "(to be blunt) it sold like crazy. Shortly after the official release date, we had to do a reprint half the size of the original printing. It was on a Monday. I still remember it now. It was quite an achievement for an unknown newcomer".{{cite book|last=Kamachi |first=Kazuma|author-link=Kazuma Kamachi |title=Toaru Majutsu no Indekkusu no Subete |date=September 2007|script-title=ja:とある魔術の禁書目録 (インデックス) ノ全テ |language=Japanese |publisher=ASCII Media Works |publication-date=September 21, 2007 |page=126 |isbn=978-4-8402-4042-0}} After the success of the first volume, the second volume was completed in 17 days.{{cite book |last=Miki |first=Kazuma |year=2015 |author-link=Kazuma Miki |script-title=ja:面白ければなんでもあり 発行累計6000万部——とある編集の仕事目録（ライフワーク） |trans-title=If It's Interesting Anything Goes: 600 Million Copies Printed—The Day in the Life of a Certain Editor |url=http://amwbooks.asciimw.jp/trial/978-4-04-865715-0/C2-01/ |language=Japanese |publisher=ASCII Media Works |publication-date=December 9, 2015 |isbn=978-4-04-865715-0 |access-date=June 13, 2021 |archive-date=January 16, 2020 |archive-url=https://web.archive.org/web/20200116014643/http://amwbooks.asciimw.jp/trial/978-4-04-865715-0/C2-01/ |url-status=live }}{{cite book |last=Kamachi |first=Kazuma |author-link=Kazuma Kamachi |chapter=Afterword |title=A Certain Magical Index |date=February 24, 2015 |volume=2 |publisher=Yen Press |publication-date=February 24, 2015 |page=235 |isbn=978-0-316-25942-2}} Subsequent volumes were also completed quickly, with the story for the ninth volume completed before the release of the fifth volume.

{{See also|List of A Certain Magical Index light novels{{!}}List of A Certain Magical Index light novels}}

A Certain Magical Index is a light novel series written by Kamachi and illustrated by Kiyotaka Haimura. ASCII Media Works published 25 volumes between April 10, 2004, and August 10, 2011, under their Dengeki Bunko imprint; 22 comprise the main story{{cite web |url=http://asciimw.jp/search/mode/item/cd/A0410890 |title=Toaru Majutsu no Indekkusu |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録 |trans-title=A Certain Magical Index |access-date=February 21, 2024 |archive-date=October 2, 2018 |archive-url=https://web.archive.org/web/20181002020146/http://asciimw.jp/search/mode/item/cd/A0410890 |url-status=dead }}{{cite web |url=http://asciimw.jp/search/mode/item/cd/A1008970 |title=Toaru Majutsu no Indekkusu (22) |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録（22） |trans-title=A Certain Magical Index (22) |access-date=February 21, 2024 |archive-date=August 13, 2011 |archive-url=https://web.archive.org/web/20110813044625/http://asciimw.jp/search/mode/item/cd/A1008970 |url-status=dead }} while the other three are short story collections.{{cite web |url=http://asciimw.jp/search/mode/item/cd/A0701870 |title=Toaru Majutsu no Indekkusu SS |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録SS |trans-title=A Certain Magical Index SS |access-date=February 21, 2024 |archive-date=August 13, 2011 |archive-url=https://web.archive.org/web/20110813044119/http://asciimw.jp/search/mode/item/cd/A0701870 |url-status=dead }}{{cite web |url=http://asciimw.jp/search/mode/item/cd/A0805670 |title=Toaru Majutsu no Indekkusu SS (2) |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録SS（2） |trans-title=A Certain Magical Index SS (2) |access-date=February 21, 2024 |archive-date=August 13, 2011 |archive-url=https://web.archive.org/web/20110813044426/http://asciimw.jp/search/mode/item/cd/A0805670 |url-status=dead }}{{cite web |url=http://asciimw.jp/search/mode/item/cd/A1112380 |title=Toaru Majutsu no Indekkusu SP |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録SP |trans-title=A Certain Magical Index SP |access-date=February 21, 2024 |archive-date=October 18, 2014 |archive-url=https://web.archive.org/web/20141018004524/http://asciimw.jp/search/mode/item/cd/A1112380 |url-status=dead }} On May 4, 2021, all volumes were free to read for one day in the Dengeki Novekomi app developed by Kadokawa Corporation.{{cite news |date=May 1, 2021 |script-title=ja:電撃文庫『とある魔術の禁書目録』全24巻が1日限定で無料に！ |trans-title=All 24 volumes of Dengeki Bunko's "A Certain Magical Index" are free for one day only! |url=https://dengekionline.com/articles/78290/ |language=Japanese |work=Dengeki Online |access-date=June 11, 2021 |archive-date=May 25, 2021 |archive-url=https://web.archive.org/web/20210525111950/https://dengekionline.com/articles/78290/ |url-status=live}} Yen Press licensed the series in North America in April 2014, which began releasing under their Yen On imprint in November,{{cite news |last=Loo |first=Egan |date=April 20, 2014 |title=Yen Press Adds A Certain Magical Index Light Novels |url=https://www.animenewsnetwork.com/news/2014-04-19/yen-press-adds-a-certain-magical-index-light-novels |work=Anime News Network |access-date=April 19, 2014 |archive-date=July 9, 2019 |archive-url=https://web.archive.org/web/20190709081857/https://www.animenewsnetwork.com/news/2014-04-19/yen-press-adds-a-certain-magical-index-light-novels |url-status=live}} and its omnibus edition in November 2022.{{Cite web |last=Loo |first=Egan |date=November 19, 2022 |title=Yen Press Announces Over 2 Dozen Titles at Anime NYC |url=https://www.animenewsnetwork.com/news/2022-11-19/yen-press-announces-over-2-dozen-titles-at-anime-nyc/.192081 |url-status=live |archive-url=https://web.archive.org/web/20221119224453/https://www.animenewsnetwork.com/news/2022-11-19/yen-press-announces-over-2-dozen-titles-at-anime-nyc/.192081 |archive-date=November 19, 2022 |access-date=November 20, 2022 |website=Anime News Network}}

A sequel series, titled {{Nihongo|A Certain Magical Index: New Testament|新約 とある魔術の禁書目録|Shinyaku Toaru Majutsu no Indekkusu}}, began publication on March 10, 2011{{cite web |url=http://asciimw.jp/search/mode/item/cd/A1100760 |title=Shinyaku Toaru Majutsu no Indekkusu |publisher=ASCII Media Works |language=Japanese |script-title=ja:新約 とある魔術の禁書目録 |trans-title=A Certain Magical Index: New Testament |access-date=November 11, 2013 |archive-date=October 18, 2014 |archive-url=https://web.archive.org/web/20141018004556/http://asciimw.jp/search/mode/item/cd/A1100760 |url-status=live }} and concluded on July 10, 2019, with the publication of its 23rd volume.{{cite web |url=https://www.kadokawa.co.jp/product/321904000053/ |title=Shinyaku Toaru Majutsu no Indekkusu (22) Ribāsu |publisher=ASCII Media Works |language=Japanese |script-title=ja:新約 とある魔術の禁書目録（22）リバース |trans-title=A Certain Magical Index: New Testament (22) Reverse |access-date=February 21, 2024 |archive-date=July 17, 2019 |archive-url=https://web.archive.org/web/20190717123848/https://www.kadokawa.co.jp/product/321904000053/ |url-status=dead }} On May 4, 2021, they began to be published in the Dengeki Novekomi app. A third light novel series, titled {{Nihongo|A Certain Magical Index: Genesis Testament|創約 とある魔術の禁書目録|Sōyaku Toaru Majutsu no Indekkusu}}, began publication on February 7, 2020.{{cite web |url=https://www.kadokawa.co.jp/product/321906000075/ |title=Sōyaku Toaru Majutsu no Indekkusu |publisher=ASCII Media Works |language=Japanese |script-title=ja:創約 とある魔術の禁書目録 |trans-title=A Certain Magical Index: Genesis Testament |access-date=January 30, 2020 |archive-date=January 31, 2020 |archive-url=https://web.archive.org/web/20200131043502/https://www.kadokawa.co.jp/product/321906000075/ |url-status=live }} Yen Press has acquired New Testament for English publication.{{cite web|title=Yen Press Licenses My Poison Princess Is Still Cute Manga, A Certain Magical Index NT Novels|url=https://www.animenewsnetwork.com/news/2023-07-21/yen-press-licenses-my-poison-princess-is-still-cute-manga-a-certain-magical-index-nt-novels/.200542|website=Anime News Network|last=Mateo|first=Alex|date=July 21, 2023|access-date=July 21, 2023}}

Kamachi wrote short novels exclusively for Haimura's three artbook collections. The first short novel, titled A Certain Magical Index SS: Love Letter Competition, was included in the release of Kiyotaka Haimura Artbook rainbow spectrum:colors on February 28, 2011.{{cite news |date=February 21, 2011 |script-title=ja:禁書の短編小説も収録！ 灰村キヨタカの画集が発売 |trans-title=Also includes a short story about Index! Kiyotaka Haimura's art book is now available! |url=https://ascii.jp/elem/000/000/589/589930/ |language=Japanese |work=Weekly ASCII |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614092120/https://ascii.jp/elem/000/000/589/589930/amp/ |url-status=live }} The second short novel, titled New Testament: A Certain Magical Index SS, was included in the release of Kiyotaka Haimura Artbook 2 rainbow spectrum:notes on September 9, 2014.{{cite web |url=https://dengekibunko.jp/product/index/312119400000.html |publisher=ASCII Media Works |language=Japanese |script-title=ja:灰村キヨタカ画集2 rainbow spectrum：notes |trans-title=Kiyotaka Haimura Artbook 2 rainbow spectrum: notes |access-date=June 14, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610235818/https://dengekibunko.jp/product/index/312119400000.html |url-status=live }} The third short novel, titled Genesis Testament: A Certain Magical Index SS, was included in the release of Kiyotaka Haimura Artbook 3 CROSS on May 9, 2020.{{cite web |url=https://dengekibunko.jp/product/index/321912000003.html |publisher=ASCII Media Works |language=Japanese |script-title=ja:はいむらきよたか画集3 CROSS |trans-title=Kiyotaka Haimura Artbook 3 CROSS |access-date=June 14, 2021 |archive-date=January 25, 2021 |archive-url=https://web.archive.org/web/20210125084340/https://dengekibunko.jp/product/index/321912000003.html |url-status=live }}

The bonus novels that Kamachi wrote for the series' Blu-ray/DVD releases are compiled into two volumes titled {{Nihongo|A Certain Magical Index: Apocrypha Archive|とある魔術の禁書目録 外典書庫|Toaru Majutsu no Indekkusu: Gaiten Shoku}} to commemorate the 15th anniversary of his debut,{{cite news |last=Magi |first=Inaya |date=June 8, 2020 |script-title=ja:鎌池和馬先生デビュー15周年記念！『とある』の特典小説集が発売 |trans-title=Celebrating the 15th anniversary of Kazuma Kamachi's debut! Special novel collection of "Toaru" released! |url=https://dengekionline.com/articles/36953/ |language=Japanese |work=Dengeki Online |access-date=June 10, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610064604/https://dengekionline.com/articles/36953/ |url-status=live }} which were published on June 10{{cite web |url=https://dengekibunko.jp/product/index/322002000145.html |title=Toaru Majutsu no Indekkusu: Gaiten Shoku (1) |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録 外典書庫（1） |trans-title=A Certain Magical Index: Apocrypha Archive (1) |access-date=June 10, 2021 |archive-date=May 13, 2020 |archive-url=https://web.archive.org/web/20200513014457/https://dengekibunko.jp/product/index/322002000145.html |url-status=live }} and August 7, 2020.{{cite web |url=https://dengekibunko.jp/product/index/322002000146.html |title=Toaru Majutsu no Indekkusu: Gaiten Shoku (2) |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録 外典書庫（2） |trans-title=A Certain Magical Index: Apocrypha Archive (2) |access-date=June 10, 2021 |archive-date=January 24, 2021 |archive-url=https://web.archive.org/web/20210124023729/https://dengekibunko.jp/product/index/322002000146.html |url-status=live }}

A spin-off novel series written by Kamachi and illustrated by Nilitsu focusing on the women belonging to Academy City's dark side, titled {{Nihongo|A Certain Item of Dark Side|とある暗部の{{ruby-ja|少女共棲|アイテム}}|Toaru Anbu no Aitemu}},{{efn|The kanji 少女共棲 in the Japanese title is read as Shōjo Kyōsei.}} was announced in January 2023.{{Cite web |last=Hazra |first=Adriana |date=January 2, 2023 |title=Kazuma Kamachi Launches 'A Certain' Series Spinoff Novels About ITEM Group in March |url=https://www.animenewsnetwork.com/news/2023-01-02/kazama-kamachi-launches-a-certain-series-spinoff-novels-about-item-group-in-march/.193513 |url-status=live |archive-url=https://web.archive.org/web/20230102071719/https://www.animenewsnetwork.com/news/2023-01-02/kazama-kamachi-launches-a-certain-series-spinoff-novels-about-item-group-in-march/.193513 |archive-date=January 2, 2023 |access-date=January 2, 2023 |website=Anime News Network}} The first volume was released on March 10, 2023.{{cite web|script-title=ja:とある暗部の少女共棲|url=https://dengekibunko.jp/product/index/322211000055.html|publisher=ASCII Media Works|access-date=February 16, 2025|lang=ja |date=December 25, 2024 }}

{{See also|List of A Certain Magical Index chapters{{!}}List of A Certain Magical Index chapters}}

The series has been adapted into two manga series. The one based on the novels is illustrated by Chuya Kogino and started serialization in the May 2007 issue of Square Enix's Monthly Shōnen Gangan. The first tankōbon volume was released in Japan on November 10, 2007.{{cite web |url=https://magazine.jp.square-enix.com/top/comics/detail/9784757521575/ |title=Toaru Majutsu no Indekkusu 1 |publisher=Square Enix |language=Japanese |script-title=ja:とある魔術の禁書目録 1 |trans-title=A Certain Magical Index 1 |access-date=June 11, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610173844/https://magazine.jp.square-enix.com/top/comics/detail/9784757521575/ |url-status=live }} As of November 12, 2024, 31 volumes have been published. Yen Press has licensed the series in North America{{cite news |last=Mahoney |first=Rachel |date=October 11, 2014 |title=Yen Press Licenses A Certain Magical Index, Trinity Seven, Chaika – The Coffin Princess, Prison School Manga |url=https://www.animenewsnetwork.com/news/2014-10-10/yen-press-licenses-a-certain-magical-index-trinity-seven-chaika-the-coffin-princess-prison-school-manga/.79789 |work=Anime News Network |access-date=October 10, 2014 |archive-date=June 24, 2019 |archive-url=https://web.archive.org/web/20190624130119/https://www.animenewsnetwork.com/news/2014-10-10/yen-press-licenses-a-certain-magical-index-trinity-seven-chaika-the-coffin-princess-prison-school-manga/.79789 |url-status=live }} and has been publishing the manga since May 19, 2015.{{cite web |url=https://yenpress.com/9780316302227/a-certain-magical-index-vol-1-manga/ |title=A Certain Magical Index, Vol. 1 (manga) |publisher=Yen Press |access-date=June 11, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610173841/https://yenpress.com/9780316302227/a-certain-magical-index-vol-1-manga/ |url-status=live }} The manga is also licensed in Italy by Star Comics.{{cite web |url=https://www.starcomics.com/fumetto/mitico-186-a-certain-magical-index-1 |title=A Certain Magical Index n.1 |publisher=Star Comics |language=Italian |access-date=June 11, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610173851/https://www.starcomics.com/fumetto/mitico-186-a-certain-magical-index-1 |url-status=live}}

The other manga adaptation based on A Certain Magical Index: The Movie – The Miracle of Endymion is illustrated by Ryōsuke Asakura and was serialized from February 12{{cite news |last=Nelkin |first=Sarah |date=January 13, 2013 |title=A Certain Magical Index Film Inspires Manga Series |url=https://www.animenewsnetwork.com/news/2013-01-12/a-certain-magical-index-film-inspires-manga-series |work=Anime News Network |access-date=January 12, 2013 |archive-date=April 24, 2019 |archive-url=https://web.archive.org/web/20190424053138/https://www.animenewsnetwork.com/news/2013-01-12/a-certain-magical-index-film-inspires-manga-series |url-status=live}} to October 12, 2013. Square Enix published the first volume on August 27{{cite web |url=https://magazine.jp.square-enix.com/top/comics/detail/9784757540354/ |title=Toaru Majutsu no Indekkusu: Endymion no Kiseki 1 |publisher=Square Enix |language=Japanese |script-title=ja:とある魔術の禁書目録 エンデュミオンの奇蹟 1 |trans-title=A Certain Magical Index: Miracle of Endymion 1 |access-date=June 11, 2021 |archive-date=October 31, 2020 |archive-url=https://web.archive.org/web/20201031103242/https://magazine.jp.square-enix.com/top/comics/detail/9784757540354/ |url-status=live }} and the second one on October 22.{{cite news |last=Nelkin |first=Sarah |date=September 2, 2013 |title=A Certain Magical Index Film's Manga Listed as Ending in Volume 2 |url=https://www.animenewsnetwork.com/news/2013-09-01/a-certain-magical-index-film-manga-listed-as-ending-in-volume-2 |work=Anime News Network |access-date=June 11, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610175342/https://www.animenewsnetwork.com/news/2013-09-01/a-certain-magical-index-film-manga-listed-as-ending-in-volume-2 |url-status=live }}

{{Main|A Certain Scientific Railgun{{!}}A Certain Scientific Railgun|A Certain Scientific Accelerator{{!}}A Certain Scientific Accelerator|A Certain Scientific Railgun: Astral Buddy{{!}}A Certain Scientific Railgun: Astral Buddy}}

A side-story manga series illustrated by Motoi Fuyukawa, titled A Certain Scientific Railgun, started serialization in the April 2007 issue of Dengeki Daioh.{{cite news |last=Loo |first=Egan |date=March 18, 2009 |title=To Aru Kagaku no Railgun Manga's Anime Green-Lit (Update 2) |url=https://www.animenewsnetwork.com/news/2009-03-18/to-aru-kagaku-no-railgun-light-novels-anime-green-lit |website=Anime News Network |access-date=June 13, 2021 |archive-date=April 28, 2021 |archive-url=https://web.archive.org/web/20210428001747/https://www.animenewsnetwork.com/news/2009-03-18/to-aru-kagaku-no-railgun-light-novels-anime-green-lit |url-status=live }} As of March 2023, 18 volumes have been released.{{cite book |language=Japanese |script-title=ja:とある魔術の禁書目録外伝 とある科学の超電磁砲(18) (電撃コミックス) |trans-title=A Certain Magical Index Side Story: A Certain Scientific Railgun (18) (Dengeki Comics) |id={{ASIN|4049149591|country=jp}} }} Its spin-off, titled A Certain Scientific Railgun: Astral Buddy, was serialized in Dengeki Daioh from April 27, 2017,{{cite news |last=Antonio |first=Rafael |date=March 28, 2017 |title=Dengeki Daioh Launches Kino's Journey Manga, A Certain Scientific Railgun Spinoff |url=https://www.animenewsnetwork.com/news/2017-03-28/dengeki-daioh-launches-kino-journey-manga-a-certain-scientific-railgun-spinoff/.114019 |work=Anime News Network |access-date=June 13, 2021 |archive-date=May 21, 2021 |archive-url=https://web.archive.org/web/20210521233804/https://www.animenewsnetwork.com/news/2017-03-28/dengeki-daioh-launches-kino-journey-manga-a-certain-scientific-railgun-spinoff/.114019 |url-status=live }} to July 27, 2020.{{cite news |last=Mateo |first=Alex |date=July 28, 2020 |title=A Certain Scientific Railgun: Astral Buddy Manga Ends |url=https://www.animenewsnetwork.com/news/2020-07-28/a-certain-scientific-railgun-astral-buddy-manga-ends/.162287 |work=Anime News Network |access-date=June 13, 2021 |archive-date=April 11, 2021 |archive-url=https://web.archive.org/web/20210411190318/https://www.animenewsnetwork.com/news/2020-07-28/a-certain-scientific-railgun-astral-buddy-manga-ends/.162287 |url-status=live }} It was published in four volumes.{{cite web |url=https://www.kadokawa.co.jp/product/322005000073 |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある科学の超電磁砲外伝 アストラル・バディ4 |trans-title=A Certain Scientific Railgun Side Story: Astral Buddy 4 |access-date=June 13, 2021 |archive-date=April 11, 2021 |archive-url=https://web.archive.org/web/20210411190318/https://www.kadokawa.co.jp/product/322005000073 |url-status=live }} A second side-story manga series illustrated by Arata Yamaji, titled A Certain Scientific Accelerator, was serialized in Dengeki Daioh from December 27, 2013,{{cite news |last=Ressler |first=Karen |date=August 26, 2013 |url=https://www.animenewsnetwork.com/news/2013-08-26/toaru-majutsu-no-index-accelerator-gets-his-own-manga |title=Toaru Majutsu no Index's Accelerator Gets His Own Manga (Updated) |work=Anime News Network |access-date=June 13, 2021 |archive-date=May 13, 2021 |archive-url=https://web.archive.org/web/20210513072020/https://www.animenewsnetwork.com/news/2013-08-26/toaru-majutsu-no-index-accelerator-gets-his-own-manga |url-status=live }} to July 27, 2020.{{cite news |last=Hazra |first=Adriana |date=June 29, 2020 |title=A Certain Scientific Accelerator Manga Ends in July |url=https://www.animenewsnetwork.com/news/2020-06-29/a-certain-scientific-accelerator-manga-ends-in-july/.161175 |work=Anime News Network |access-date=June 13, 2021 |archive-date=June 13, 2021 |archive-url=https://web.archive.org/web/20210613192756/https://www.animenewsnetwork.com/news/2020-06-29/a-certain-scientific-accelerator-manga-ends-in-july/.161175 |url-status=live }} It was published in twelve volumes.{{cite web |url=https://www.kadokawa.co.jp/product/322005000077/ |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録外伝 とある科学の一方通行（12） |trans-title=A Certain Magical Index Side Story: A Certain Scientific Accelerator (12) |access-date=June 13, 2021 |archive-date=April 29, 2021 |archive-url=https://web.archive.org/web/20210429211307/https://www.kadokawa.co.jp/product/322005000077/ |url-status=live }} A third side-story manga series illustrated by Nankyoku Kisaragi, titled {{Nihongo|A Certain Scientific Dark Matter|とある科学の未元物質|Toaru Kagaku no Dāku Matā}},{{efn|The official title is {{Nihongo|A Certain Magical Index Side Story: A Certain Scientific Dark Matter|とある魔術の{{ruby-ja|禁書目録|インデックス}}外伝 とある科学の{{ruby-ja|未元物質|ダークマター}}|Toaru Majutsu no Indekkusu Gaiden: Toaru Kagaku no Dāku Matā}}.}} was serialized in ASCII Media Works magazine Dengeki Daioh from August 27, 2019, to March 26, 2020 (the same day the compiled volume was published).{{cite news |date=March 25, 2020 |script-title=ja:主役は学園都市第二位・垣根帝督！『とある魔術の禁書目録外伝 とある科学の未元物質』コミックスが3月26日発売!! |trans-title=The main character is the second place in Academy City, Teitoku Kakine! The "A Certain Magical Index Side Story: A Certain Scientific Dark Matter" comics go on sale on March 26th! |url=https://dengekidaioh.jp/blog/darkmatter/entry-10326.html |language=Japanese |work=Dengeki Daioh |access-date=June 11, 2021 |archive-date=July 14, 2021 |archive-url=https://web.archive.org/web/20210714180318/https://dengekidaioh.jp/blog/darkmatter/entry-10326.html |url-status=live }} A fourth side-story manga series illustrated by Yasuhito Nogi, titled {{Nihongo|A Certain Scientific Mental Out|とある科学の心理掌握|Toaru Kagaku no Mentaru Auto}},{{efn|The official title is {{Nihongo|A Certain Magical Index Side Story: A Certain Scientific Mental Out|とある魔術の{{ruby-ja|禁書目録|インデックス}}外伝 とある科学の{{ruby-ja|心理掌握|メンタルアウト}}|Toaru Majutsu no Indekkusu Gaiden: Toaru Kagaku no Mentaru Auto}}.}} began serialization in Comic Newtype website on July 27, 2021.{{Cite web |last=Pineda |first=Rafael Antonio |date=July 31, 2021 |title=A Certain Magical Index Light Novels Get Spinoff Manga About Misaki Shokuhō |url=https://www.animenewsnetwork.com/news/2021-07-30/a-certain-magical-index-light-novels-get-spinoff-manga-about-misaki-shokuho/.175614 |url-status=live |archive-url=https://web.archive.org/web/20220418151337/https://www.animenewsnetwork.com/news/2021-07-30/a-certain-magical-index-light-novels-get-spinoff-manga-about-misaki-shokuho/.175614 |archive-date=April 18, 2022 |access-date=April 18, 2022 |website=Anime News Network}} As of February 26, 2025, four volumes have been published.{{Cite web |url=https://www.kadokawa.co.jp/product/322410001112/ |website=Kadokawa |language=Japanese |script-title=ja:とある魔術の禁書目録外伝 とある科学の心理掌握（４） |trans-title=A Certain Magical Index Side Story: A Certain Scientific Mental Out (4) |access-date=February 3, 2025 |archive-date=February 3, 2025 |archive-url=https://web.archive.org/web/20250203151410/https://www.kadokawa.co.jp/product/322410001112/ |url-status=live }}

A yonkoma manga spin-off illustrated by Mijin Kouka, titled {{Nihongo|A Certain Everyday Index-san|とある日常のいんでっくすさん|Toaru Nichijō no Indekkusu-san}}, was serialized in Square Enix's Monthly Shōnen Gangan magazine from September 12, 2013,{{Cite web |url=https://natalie.mu/comic/news/99131 |date=September 12, 2013 |website=Natalie |language=Japanese |script-title=ja:禁書目録4コマ「とある日常のいんでっくすさん」ガンガンで |trans-title=A Certain Everyday Index-san, a four-panel comic strip in Gangan |access-date=April 18, 2022 |url-status=live |archive-url=https://web.archive.org/web/20220418143725/https://natalie.mu/comic/news/99131 |archive-date=April 18, 2022}} to May 12, 2016.{{Cite web |url=https://natalie.mu/comic/news/186843 |date=May 12, 2016 |website=Natalie |language=Japanese |script-title=ja:るーすぼーい原作の新連載は"人類の敵"VS能力者、「たなけだ」付録も |trans-title=New serialization of the original story by Looseboy is "Enemies of Humanity" VS psychic, with a Tanaka-kun supplement |access-date=April 18, 2022 |url-status=live |archive-url=https://web.archive.org/web/20220418144831/https://natalie.mu/comic/news/186843 |archive-date=April 18, 2022}} A total of five tankōbon volumes had been published in Japan from February 22, 2014,{{Cite web |url=https://natalie.mu/comic/news/109579 |date=February 12, 2014 |website=Natalie |language=Japanese |script-title=ja:ガンガンに禁書目録ポスター、高津カリノ＆もち連載予告も |trans-title=Gangan also has A Certain Magical Index poster, Karino Takatsu & Mochi serialization previews |access-date=April 18, 2022 |url-status=live |archive-url=https://web.archive.org/web/20220418145945/https://natalie.mu/comic/news/109579 |archive-date=April 18, 2022}} to May 21, 2016.{{Cite tweet |author=少年ガンガン |author-link=Shōnen Gangan |user=shonen_gangan |number=733865539945136132 |date=May 21, 2016 |script-title=ja:とある日常のいんでっくすさん最終巻になります！いろんなキャラクターのあるかもしれないいろんな日常を最後まで楽しんで読んでいただけたら幸いです。（みじんこうか）#少年ガンガン |trans-title=This will be the final volume of A Certain Everyday Index-san! I hope you enjoy reading the various daily lives that various characters may have until the end. (Mijin Kouka) #ShonenGangan |language=Japanese |access-date=April 18, 2022 |url-status=live |archive-url=https://web.archive.org/web/20220418150928/https://twitter.com/shonen_gangan/status/733865539945136132 |archive-date=April 18, 2022}} In March 2023, Kamachi revealed the manga adaptation of A Certain ITEM of Dark Side by Strelka which is serialized in Dengeki Daioh magazine{{Cite tweet |author=鎌池和馬公式情報 |author-link=Kazuma Kamachi |user=KAMACHI_KA |number=1634042554558861312 |date=March 10, 2023 |script-title=ja:【速報！】本日発売の『とある暗部の少女共棲』ですが、はやくもコミカライズ決定！月刊コミック電撃大王にて企画進行中です！作画はstrelka（@hh_strelka）が担当します！続報をお待ちください！！ |trans-title=[Breaking News!] A Certain Item of Dark Side is out today, and it's already going to be a manga! The project is underway at the monthly magazine Dengeki Daioh! Illustrations will be done by strelka (@hh_strelka)! Stay tuned for more news!! |language=Japanese |access-date=March 11, 2023 |url-status=live |archive-url=https://web.archive.org/web/20230310205114/https://twitter.com/KAMACHI_KA/status/1634042554558861312 |archive-date=March 10, 2023}}{{Cite web |date=April 26, 2023 |language=Japanese |script-title=ja:電撃大王29周年！『新米姉妹のふたりごはん』が肉(29)イラストでお祝い!! 複製原画プレゼント企画や新連載予告が盛りだくさん!! |trans-title=The 29th anniversary of Dengeki Daioh! Shinmai Shimai no Futari Gohan celebrates with meat (29) illustrations! A lot of original reproductions present project and previews of new serials! |url=https://prtimes.jp/main/html/rd/p/000012576.000007006.html |url-status=live |archive-url=https://web.archive.org/web/20230426085617/https://prtimes.jp/main/html/rd/p/000012576.000007006.html |archive-date=April 26, 2023 |access-date=April 26, 2023 |website=PR Times}} starting October 26 of that year.{{Cite web |url=https://natalie.mu/comic/news/546830 |date=October 27, 2023 |website=Natalie |language=Japanese |script-title=ja:「とある暗部の少女共棲」コミカライズなど、電撃大王で新連載4本が一挙スタート |trans-title=Four new series start at Dengeki Daioh, including comic version of “A Certain Item of Dark Side” access.date=February 21, 2024 |url-status=live |archive-url=https://web.archive.org/web/20240220033905/https://natalie.mu/comic/news/546830 |archive-date=February 20, 2024 }}

{{See also|List of A Certain Magical Index episodes{{!}}List of A Certain Magical Index episodes|A Certain Magical Index: The Movie – The Miracle of Endymion{{!}}A Certain Magical Index: The Movie – The Miracle of Endymion}}

A 24-episode anime adaptation of A Certain Magical Index was produced by J.C.Staff and directed by Hiroshi Nishikiori,{{cite news |last=Loo |first=Egan |date=June 4, 2008 |title=To Aru Majutsu no Index Light Novels Get TV Anime |url=https://www.animenewsnetwork.com/news/2008-06-03/to-aru-majutsu-no-index-light-novels-gets-tv-anime |work=Anime News Network |access-date=June 4, 2008 |archive-date=May 7, 2019 |archive-url=https://web.archive.org/web/20190507005124/https://www.animenewsnetwork.com/news/2008-06-03/to-aru-majutsu-no-index-light-novels-gets-tv-anime |url-status=live}} which was aired in Japan from October 4, 2008, to March 19, 2009. The anime was collected into eight Blu-ray and DVD sets, which were released from January 23{{cite web |url=https://www.amazon.co.jp/dp/B001HZEYQ8 |website=Amazon |date=January 23, 2009 |language=Japanese |script-title=ja:とある魔術の禁書目録 第1巻 (初回限定版) [DVD] |trans-title=A Certain Magical Index Volume 1 (First Press Limited Edition) [DVD] |access-date=June 12, 2021 |archive-date=July 14, 2021 |archive-url=https://web.archive.org/web/20210714180327/https://www.amazon.co.jp/dp/B001HZEYQ8 |url-status=live }} to August 21, 2009.{{cite web |url=https://www.amazon.co.jp/dp/B001HZEYTU |website=Amazon |date=August 21, 2009 |language=Japanese |script-title=ja:とある魔術の禁書目録 第8巻 (通常版) [DVD] |trans-title=A Certain Magical Index Vol. 8 (Normal Edition) [DVD] |access-date=June 12, 2021 |archive-date=July 14, 2021 |archive-url=https://web.archive.org/web/20210714180250/https://www.amazon.co.jp/dp/B001HZEYTU |url-status=live }}

A second season titled A Certain Magical Index II began airing in Japan from October 8, 2010, to April 1, 2011{{cite news |last=Loo |first=Egan |date=June 7, 2010 |title=Toaru Majutsu no Index's 2nd Season Green-Lit |url=https://www.animenewsnetwork.com/news/2010-06-07/toaru-majutsu-no-index-2nd-season-green-lit |work=Anime News Network |access-date=June 7, 2010 |archive-date=April 20, 2019 |archive-url=https://web.archive.org/web/20190420112819/https://www.animenewsnetwork.com/news/2010-06-07/toaru-majutsu-no-index-2nd-season-green-lit |url-status=live }} and was also streamed on Nico Nico Douga.{{cite news |last=Loo |first=Egan |date=September 13, 2010 |title=Nico Nico to Stream 7 More Anime Right After Airing |url=https://www.animenewsnetwork.com/news/2010-09-13/nico-nico-to-stream-7-more-anime-right-after-airing |work=Anime News Network |access-date=September 13, 2010 |archive-date=April 22, 2019 |archive-url=https://web.archive.org/web/20190422193059/https://www.animenewsnetwork.com/news/2010-09-13/nico-nico-to-stream-7-more-anime-right-after-airing |url-status=live }} The second season's eight volumes of Blu-ray/DVD sets were released from January 26{{cite web |url=https://toaru-project.com/index_1_2/goods/bddvd/2nd/01.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:とある魔術の禁書目録II Blu-ray＆DVD 第1巻 2011年1月26日発売 |trans-title=A Certain Magical Index II Blu-ray & DVD Volume 1 Released on January 26, 2011 |access-date=June 12, 2021 |archive-date=June 8, 2021 |archive-url=https://web.archive.org/web/20210608022803/https://toaru-project.com/index_1_2/goods/bddvd/2nd/01.html |url-status=live }} to September 22, 2011.{{cite web |url=https://toaru-project.com/index_1_2/goods/bddvd/2nd/08.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:とある魔術の禁書目録II 第8巻〈初回限定版〉Blu-ray＆DVD 2011/09/22発売 |trans-title=A Certain Magical Index II Volume 8 Blu-ray & DVD Released on September 22, 2011 |access-date=June 12, 2021 |archive-date=June 8, 2021 |archive-url=https://web.archive.org/web/20210608010910/https://toaru-project.com/index_1_2/goods/bddvd/2nd/08.html |url-status=live }}

An animated film titled {{Nihongo|A Certain Magical Index: The Movie – The Miracle of Endymion|劇場版 とある魔術の禁書目録 エンデュミオンの奇蹟|Gekijōban Toaru Majutsu no Indekkusu: Endyumion no Kiseki}} was released in Japan on February 23, 2013.{{cite news |last=Loo |first=Egan |date=July 4, 2012 |title=A Certain Magical Index Film Slated For February 23, 2013 |url=https://www.animenewsnetwork.com/news/2012-07-03/a-certain-magical-index-film-slated-for-february-23-2013 |work=Anime News Network |access-date=July 4, 2012 |archive-date=April 20, 2019 |archive-url=https://web.archive.org/web/20190420121246/https://www.animenewsnetwork.com/news/2012-07-03/a-certain-magical-index-film-slated-for-february-23-2013 |url-status=live }} It is based on an original story written by Kamachi and features the main characters from both Index and Railgun anime series, along with the new ones designed by Haimura.{{cite news |last=Sherman |first=Jennifer |date=June 7, 2012 |title=Toaru Majutsu no Index Novels' Haimura Draws Film's New Characters |url=https://www.animenewsnetwork.com/news/2012-06-07/toaru-majutsu-no-index-novels-haimura-draws-film-new-characters |work=Anime News Network |access-date=June 25, 2012 |archive-date=May 22, 2019 |archive-url=https://web.archive.org/web/20190522052221/https://www.animenewsnetwork.com/news/2012-06-07/toaru-majutsu-no-index-novels-haimura-draws-film-new-characters |url-status=live }}{{cite news |last=Loo |first=Egan |date=August 10, 2012 |title=A Certain Magical Index Film's 1st Promo Streamed |url=https://www.animenewsnetwork.com/news/2012-08-10/a-certain-magical-index-film-1st-promo-streamed |work=Anime News Network |access-date=August 10, 2012 |archive-date=May 22, 2019 |archive-url=https://web.archive.org/web/20190522083205/https://www.animenewsnetwork.com/news/2012-08-10/a-certain-magical-index-film-1st-promo-streamed |url-status=live }} The Blu-ray/DVD set of the film, which was released on August 28, is included with a bonus anime titled A Certain Magical Index-tan: The Movie – The Miracle of Endymion... Happened, or Maybe Not.{{cite news |last=Loo |first=Egan |date=July 15, 2013 |title=A Certain Magical Index Film's Blu-ray/DVD Previewed in TV Ad |url=https://www.animenewsnetwork.com/news/2013-07-15/a-certain-magical-index-film-blu-ray/dvd-previewed-in-tv-ad |work=Anime News Network |access-date=June 14, 2021 |archive-date=November 1, 2020 |archive-url=https://web.archive.org/web/20201101103901/https://www.animenewsnetwork.com/news/2013-07-15/a-certain-magical-index-film-blu-ray/dvd-previewed-in-tv-ad |url-status=live }}

The 26-episode third season titled A Certain Magical Index III aired in Japan from October 5, 2018, to April 5, 2019.{{cite news |date=October 1, 2017 |script-title=ja:2018年『とある』プロジェクト始動！『とある魔術の禁書目録III』TVアニメ制作決定 |trans-title=2018 "Toaru" Project starts! "A Certain Magical Index III" will be produced as a TV anime! |url=https://dengekionline.com/elem/000/001/601/1601573/ |language=Japanese |work=Dengeki Online |access-date=October 1, 2017 |archive-date=December 10, 2018 |archive-url=https://web.archive.org/web/20181210023306/http://dengekionline.com/elem/000/001/601/1601573/ |url-status=live }}{{cite news |last=Pineda |first=Rafael Antonio |date=June 8, 2018 |title=A Certain Magical Index Season 3's Cast, Staff, October Premiere Revealed |url=https://www.animenewsnetwork.com/news/2018-06-08/a-certain-magical-index-season-3-cast-staff-october-premiere-revealed/.132621 |work=Anime News Network |access-date=June 8, 2018 |archive-date=June 18, 2019 |archive-url=https://web.archive.org/web/20190618140223/https://www.animenewsnetwork.com/news/2018-06-08/a-certain-magical-index-season-3-cast-staff-october-premiere-revealed/.132621 |url-status=live }} The third season's eight volumes of Blu-ray/DVD sets were released from December 26, 2018{{cite web |url=https://toaru-project.com/index_3/bd/01.html |website=toaru-project.com/index_3 |language=Japanese |script-title=ja:とある魔術の禁書目録III Vol.1＜初回仕様版＞ |trans-title=A Certain Magical Index III Vol.1 |access-date=June 12, 2021 |archive-date=May 17, 2021 |archive-url=https://web.archive.org/web/20210517165819/https://toaru-project.com/index_3/bd/01.html |url-status=live }} to July 31, 2019,{{cite web |url=https://toaru-project.com/index_3/bd/08.html |website=toaru-project.com/index_3 |language=Japanese |script-title=ja:とある魔術の禁書目録III Vol.8＜初回仕様版＞ |trans-title=A Certain Magical Index III Vol.8 |access-date=June 12, 2021 |archive-date=May 16, 2019 |archive-url=https://web.archive.org/web/20190516211047/https://toaru-project.com/index_3/bd/08.html |url-status=dead }} with episodes 6 and 7 of the bonus short anime parody titled A Certain Magical Index-tan, which depicted Index in her chibi form, included in the first and fifth limited edition releases.{{cite news |date=December 25, 2018 |script-title=ja:秋アニメ『とある魔術の禁書目録III』Blu-ray＆DVD第1巻が12月26日に発売！特典アニメ『とある魔術の禁書目録たん 6』の先行場面写真が到着 |trans-title=The first volume of the autumn anime "A Certain Magical Index III" Blu-ray & DVD will be released on December 26th! Advance scene photos of the bonus anime "A Certain Magical Index-tan 6" have arrived! |url=https://www.animatetimes.com/news/details.php?id=1545710539 |language=Japanese |work=Animate Times |publisher=Animate |access-date=June 12, 2021 |archive-date=June 12, 2021 |archive-url=https://web.archive.org/web/20210612092751/https://www.animatetimes.com/news/details.php?id=1545710539 |url-status=live }} The third season was originally planned to be a reboot but it was later decided to be a sequel instead.{{cite news |last=Morrissy |first=Kim |date=November 12, 2018 |title=A Certain Magical Index III Anime Was Originally Planned as a Reboot |url=https://www.animenewsnetwork.com/interest/2018-11-12/a-certain-magical-index-iii-anime-was-originally-planned-as-a-reboot/.139363 |work=Anime News Network |access-date=June 13, 2021 |archive-date=June 7, 2021 |archive-url=https://web.archive.org/web/20210607103337/https://www.animenewsnetwork.com/interest/2018-11-12/a-certain-magical-index-iii-anime-was-originally-planned-as-a-reboot/.139363 |url-status=live }} The three seasons were released on Hulu in Japan on March 24, 2022.{{Cite tweet |author=とあるプロジェクト公式 |user=toaru_project |number=1498221435801665538 |date=February 28, 2022 |script-title=ja:【お知らせ】「とあるシリーズ」につきまして、Huluでの配信が決定しました！3/24（木）より全シリーズ同時配信開始となります。とある魔術の禁書目録1～3期＆劇場版 とある科学の超電磁砲1～3期＆OVA とある科学の一方通行 お楽しみに♪ #禁書目録3 #アクセラレータ #超電磁砲T |trans-title=[News] "Toaru" series will be available on Hulu! All series will be available simultaneously from 3/24 (Thursday). A Certain Magical Index seasons 1–3 & The Movie, A Certain Scientific Railgun seasons 1–3 & OVA, A Certain Scientific Accelerator Enjoy♪ #Index3 #Accelerator #RailgunT |language=Japanese |access-date=April 5, 2022 |url-status=live |archive-url=https://web.archive.org/web/20220228090013/https://twitter.com/toaru_project/status/1498221435801665538 |archive-date=February 28, 2022}}

In North America, Funimation (which now goes by the name of Crunchyroll LLC) has licensed the series for home video and streaming. An English language dub began streaming on their website in September 2012 and was released on DVD on December 11.{{cite news |last=Loo |first=Egan |date=July 3, 2010 |title=Funi Adds Trigun Film, Moyashimon, Shiki, Black Butler 2, Sekirei 2, More (Update 2) |url=https://www.animenewsnetwork.com/news/2010-07-02/funi-adds-live-action-moyashimon |work=Anime News Network |access-date=July 3, 2010 |archive-date=May 9, 2019 |archive-url=https://web.archive.org/web/20190509152632/https://www.animenewsnetwork.com/news/2010-07-02/funi-adds-live-action-moyashimon |url-status=live }}{{cite news |last=Grace |first=Kimberly |date=September 18, 2012 |title=Funimation's A Certain Magical Index DVDs Delayed 6 Weeks |url=https://www.animenewsnetwork.com/news/2012-09-17/funimation-a-certain-magical-index-dvds-delayed-6-weeks |work=Anime News Network |access-date=September 18, 2012 |archive-date=April 20, 2019 |archive-url=https://web.archive.org/web/20190420112740/https://www.animenewsnetwork.com/news/2012-09-17/funimation-a-certain-magical-index-dvds-delayed-6-weeks |url-status=live }}{{cite news |last=Bunao |first=Daryl |date=October 2, 2012 |title=North American Stream List: Sept. 24–31 |url=https://www.animenewsnetwork.com/news/2012-10-01/north-american-stream-list/sept-24-31 |work=Anime News Network |access-date=October 2, 2012 |archive-date=July 27, 2019 |archive-url=https://web.archive.org/web/20190727063643/https://www.animenewsnetwork.com/news/2012-10-01/north-american-stream-list/sept-24-31 |url-status=live }} The first season aired in North America on the Funimation Channel on January 21, 2013.{{cite web |url=http://funimation.tv/schedule/2_e30121.htm |title=Funimation Mon 21 Jan 2013 |publisher=Funimation Channel |access-date=January 18, 2013 |url-status=dead |archive-url=https://web.archive.org/web/20130610042134/http://funimation.tv/schedule/2_e30121.htm |archive-date=June 10, 2013}} It can also been seen on the Crunchyroll streaming service after the Funimation brand was unified with the former in 2022.{{cite web|last=Mateo|first=Alex|date=August 9, 2021|title=Sony's Funimation Global Group Completes Acquisition of Crunchyroll from AT&T|url=https://www.animenewsnetwork.com/news/2021-08-09/sony-funimation-global-group-completes-acquisition-of-crunchyroll-from-at-t/.176073|access-date=August 9, 2021|website=Anime News Network|archive-date=August 9, 2021|archive-url=https://web.archive.org/web/20210809205048/https://www.animenewsnetwork.com/news/2021-08-09/sony-funimation-global-group-completes-acquisition-of-crunchyroll-from-at-t/.176073|url-status=live}}

The series was released in Australia by a partnership between Universal Pictures Home Entertainment and Sony Pictures.{{cite news |last=Hayward |first=Jon |date=February 18, 2013 |title=Universal Sony Home Pictures to Release Anime in Australia |url=https://www.animenewsnetwork.com/news/2013-02-18/universal-sony-home-pictures-to-release-anime-in-australia |work=Anime News Network |access-date=June 13, 2021 |archive-date=October 31, 2020 |archive-url=https://web.archive.org/web/20201031193402/https://www.animenewsnetwork.com/news/2013-02-18/universal-sony-home-pictures-to-release-anime-in-australia |url-status=live }} Funimation has also licensed the film in North America and released it at theaters in the United States on January 12, 2015.{{cite news |last=Loo |first=Egan |date=December 19, 2013 |title=Funimation Offers A Certain Magical Index II & Movie on Home Video |url=https://www.animenewsnetwork.com/news/2013-12-18/funimation-offers-a-certain-magical-index-ii-and-movie-on-home-video |work=Anime News Network |access-date=December 19, 2013 |archive-date=December 6, 2018 |archive-url=https://web.archive.org/web/20181206172757/https://www.animenewsnetwork.com/news/2013-12-18/funimation-offers-a-certain-magical-index-ii-and-movie-on-home-video |url-status=live }}{{cite news |last=Loo |first=Egan |date=January 12, 2015 |title=A Certain Magical Index Film Plays in Theaters in Texas, Virginia, NY, Missouri on Monday |url=https://www.animenewsnetwork.com/news/2015-01-11/a-certain-magical-index-film-plays-in-theaters-in-texas-virginia-ny-missouri-on-monday/.83147 |work=Anime News Network |access-date=June 12, 2021 |archive-date=June 8, 2021 |archive-url=https://web.archive.org/web/20210608072122/https://www.animenewsnetwork.com/news/2015-01-11/a-certain-magical-index-film-plays-in-theaters-in-texas-virginia-ny-missouri-on-monday/.83147 |url-status=live }} Animatsu Entertainment released the series in the United Kingdom.{{cite news |last=Osmond |author-link=Andrew Osmond (journalist) |first=Andrew |date=May 23, 2015 |title=MCM Expo Announcements: Parasyte, Sidonia, Madoka Movies, Aldnoah.Zero |url=https://www.animenewsnetwork.com/news/2015-05-23/mcm-expo-announcements-parasyte-sidonia-madoka-movies-aldnoah.zero/.88497 |work=Anime News Network |access-date=June 13, 2021 |archive-date=December 14, 2017 |archive-url=https://web.archive.org/web/20171214071839/https://www.animenewsnetwork.com/news/2015-05-23/mcm-expo-announcements-parasyte-sidonia-madoka-movies-aldnoah.zero/.88497 |url-status=live }} In Southeast Asia, Muse Communication licensed the series and broadcast it through i-Fun Anime Channel{{cite web |url=https://www.e-muse.com.tw/node/372 |date=September 21, 2018 |publisher=Muse Communication |language=Chinese |script-title=zh:秋番大排檔！《刀劍神域》、《魔禁》、《魔導少年》10月開播 |trans-title=Autumn show! "Sword Art Online", "Index", "Fairy Tail" will be broadcast in October |access-date=June 12, 2021 |url-status=dead |archive-url=https://web.archive.org/web/20191001181815/https://www.e-muse.com.tw/node/372 |archive-date=October 1, 2019}} and their YouTube channel.{{cite web |url=https://www.youtube.com/watch?v=ElZYilkHg3I&feature=youtu.be |title=A Certain Magical Index III – Episode 01 [English Sub] |date=August 21, 2019 |publisher=Muse Asia |access-date=June 12, 2021 |via=YouTube |archive-date=June 12, 2021 |archive-url=https://web.archive.org/web/20210612092746/https://www.youtube.com/watch?v=ElZYilkHg3I&feature=youtu.be |url-status=live }}

{{See also|List of A Certain Magical Index albums{{!}}List of A Certain Magical Index albums}}

Maiko Iuchi of I've Sound is in charge of music for the series' three seasons. The first opening theme music, used in episodes 1–16 of the first season of A Certain Magical Index, is "PSI-Missing",{{cite web |url=https://toaru-project.com/index_1_2/goods/cd/1st/index00590000.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:川田まみ／PSI-missing〈通常盤〉 |trans-title=Mami Kawada/PSI-missing |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614125904/https://toaru-project.com/index_1_2/goods/cd/1st/index00590000.html |url-status=live }} while the second one, used in episode 17 onwards, is "Masterpiece",{{cite web |url=https://toaru-project.com/index_1_2/goods/cd/1st/index00660000.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:川田まみ／Masterpiece |trans-title=Mami Kawada/Masterpiece |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614125907/https://toaru-project.com/index_1_2/goods/cd/1st/index00660000.html |url-status=live }} both performed by Mami Kawada. The first ending theme music, used in episodes 1–19, is {{Nihongo|"Rimless ~Rimless World~"|Rimless 〜フチナシノセカイ〜|Rimless ~Fuchinashi no Sekai~}},{{cite web |url=http://www.jcstaff.co.jp/sho-sai/index-shokai/index-music.htm |publisher=J.C.Staff |language=Japanese |script-title=ja:とある魔術の禁書目録 |trans-title=A Certain Magical Index |access-date=February 20, 2009 |url-status=dead |archive-url=https://web.archive.org/web/20090403003930/http://www.jcstaff.co.jp/sho-sai/index-shokai/index-music.htm |archive-date=April 3, 2009}} while the second one, used in episode 20 onwards, is {{Nihongo|"Oath ~Just a Little Once More~"|誓い言 ～スコシだけもう一度～|Chikaigoto ~Sukoshi Dake Mō Ichido~}},{{cite web |url=https://www.amazon.co.jp/dp/B001NOIJGE/ |website=Amazon |language=Japanese |script-title=ja:「誓い言~スコシだけもう一度~」 (TVアニメ「とある魔術の禁書目録」新EDテーマ) |trans-title="Oath ~Just a Little Once More~" (TV Anime "A Certain Magical Index" New ED Theme) |access-date=February 20, 2009 |archive-date=July 14, 2021 |archive-url=https://web.archive.org/web/20210714180253/https://www.amazon.co.jp/dp/B001NOIJGE/ |url-status=live }} both performed by Iku.

The first opening theme music of A Certain Magical Index II is "No Buts!",{{cite web |url=https://toaru-project.com/index_1_2/goods/cd/2nd/index01430000.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:川田まみ／No buts! |trans-title=Mami Kawada/No buts! |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614125906/https://toaru-project.com/index_1_2/goods/cd/2nd/index01430000.html |url-status=live }} while the second one, introduced in episode 17, is "See Visions",{{cite web |url=https://toaru-project.com/index_1_2/goods/cd/2nd/index01480000.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:川田まみ／See visionS |trans-title=Mami Kawada/See visionS |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614125904/https://toaru-project.com/index_1_2/goods/cd/2nd/index01480000.html |url-status=live }} both performed by Kawada. The first ending theme music, used in episodes 1–13, is "Magic∞World",{{cite web |url=https://toaru-project.com/index_1_2/goods/cd/2nd/index01440000.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:黒崎真音／Magic∞world |trans-title=Maon Kurosaki/Magic∞world |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614125904/https://toaru-project.com/index_1_2/goods/cd/2nd/index01440000.html |url-status=live }} while the second one, used in episode 14 onwards, is {{Nihongo|"Memories Last"|メモリーズ・ラスト|Memorīzu Rasuto}},{{cite web |url=https://toaru-project.com/index_1_2/goods/cd/2nd/index01500000.html |website=toaru-project.com/index_1_2 |language=Japanese |script-title=ja:黒崎真音／メモリーズ・ラスト |trans-title=Maon Kurosaki/Memories Last |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614125906/https://toaru-project.com/index_1_2/goods/cd/2nd/index01500000.html |url-status=live }} both performed by Kurosaki.

The ending theme music of A Certain Magical Index: The Movie – The Miracle of Endymion is "Fixed Star" by Kawada and the single was released on February 20, 2013.{{cite web |url=http://www.geneonuniversal.jp/rondorobe/music/mami_kawada/contents/hp0007/index00280000.html |title=[13th SINGLE] FIXED STAR |publisher=Geneon Universal Entertainment |language=Japanese |access-date=November 11, 2013 |url-status=dead |archive-url=https://web.archive.org/web/20131111231642/http://www.geneonuniversal.jp/rondorobe/music/mami_kawada/contents/hp0007/index00280000.html |archive-date=November 11, 2013}} The first opening theme music of A Certain Magical Index III is "Gravitation", while the second one is "Roar", both performed by Kurosaki.{{cite news |last=Pineda |first=Rafael Antonio |date=July 9, 2018 |title=A Certain Magical Index Season 3's Theme Song Artists Revealed |url=https://www.animenewsnetwork.com/news/2018-07-09/a-certain-magical-index-season-3-theme-song-artists-revealed/.134025 |work=Anime News Network |access-date=July 9, 2018 |archive-date=July 9, 2018 |archive-url=https://web.archive.org/web/20180709115058/https://www.animenewsnetwork.com/news/2018-07-09/a-certain-magical-index-season-3-theme-song-artists-revealed/.134025 |url-status=live }}{{cite news |last=Sherman |first=Jennifer |date=December 4, 2018 |title=Maon Kurosaki, Yuka Iguchi Perform A Certain Magical Index III Anime's New Theme Songs |url=https://www.animenewsnetwork.com/news/2018-12-03/maon-kurosaki-yuka-iguchi-perform-a-certain-magical-index-iii-anime-new-theme-songs/.140292 |work=Anime News Network |access-date=December 4, 2018 |archive-date=December 4, 2018 |archive-url=https://web.archive.org/web/20181204114450/https://www.animenewsnetwork.com/news/2018-12-03/maon-kurosaki-yuka-iguchi-perform-a-certain-magical-index-iii-anime-new-theme-songs/.140292 |url-status=live }} The first ending theme music is {{Nihongo|"Eve of a Revolution"|革命前夜|Kakumei Zenya}}, while the second one is {{Nihongo|"The Never-Ending Song"|終わらない歌|Owaranai Uta}}, both performed by Yuka Iguchi.

{{See also|List of A Certain Magical Index video games{{!}}List of A Certain Magical Index video games}}

A 3D fighting game titled A Certain Magical Index was developed by Shade for the PlayStation Portable (PSP) and published by ASCII Media Works on January 27, 2011.{{cite web |url=https://www.shade.co.jp/games/625/ |website=Shade |date=January 27, 2011 |language=Japanese |script-title=ja:とある魔術の禁書目録 {{pipe}} SHADE Inc. |trans-title=A Certain Magical Index {{pipe}} SHADE Inc. |access-date=February 22, 2024 |archive-date=June 13, 2021 |archive-url=https://web.archive.org/web/20210613183600/https://www.shade.co.jp/games/625/ |url-status=live }}{{cite web |url=http://d-game.dengeki.com/toaru/ |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録＜インデックス＞ {{pipe}} とある科学の超電磁砲＜レールガン＞ |trans-title=A Certain Magical Index {{pipe}} A Certain Scientific Railgun |access-date=July 20, 2010 |archive-date=November 14, 2018 |archive-url=https://web.archive.org/web/20181114150729/http://d-game.dengeki.com/toaru/ |url-status=live }} Heroz developed a social card game for Mobage titled A Certain Magical Index: Struggle Battle, which was published by ASCII Media Works on December 25, 2012.{{cite magazine |date=December 25, 2012 |script-title=ja:科学と魔術が融合した超能力バトルを勝ち進め!! Mobage『とある魔術の禁書目録 頂点決戦』配信開始 |trans-title=Win the battle of supernatural powers where science and magic are fused together! Mobage's "A Certain Magical Index: Struggle Battle" is now available! |url=https://www.famitsu.com/news/amp/201212/25026595.php |language=Japanese |magazine=Famitsu |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614080824/https://www.famitsu.com/news/amp/201212/25026595.php |url-status=live }} The game was updated to A Certain Magical Index: Struggle Battle II,{{cite web |url=https://www.4gamer.net/games/205/G020533/20150203065/ |date=February 3, 2015 |website=4Gamer.net |language=Japanese |script-title=ja:「とある魔術の禁書目録 頂点決戦」が新章突入。タイトルが"頂点決戦II"に |trans-title="A Certain Magical Index: Struggle Battle" has entered a new chapter. Title changed to "Struggle Battle II" |access-date=June 14, 2021 |archive-date=June 14, 2021 |archive-url=https://web.archive.org/web/20210614080824/https://www.4gamer.net/games/205/G020533/20150203065/ |url-status=live }} but was later announced at the end of its service on March 30, 2018.{{cite web |url=http://sp.mbga.jp/_pf_install?game_id=12011562 |website=Mobage |language=Japanese |script-title=ja:お知らせ – モバゲー |trans-title=Notice – Mobage |access-date=June 14, 2021 |archive-date=July 14, 2021 |archive-url=https://web.archive.org/web/20210714180254/https://www.mbga.jp/ |url-status=live }}

Guyzware and Namco Bandai Games announced on June 8, 2012, a collaboration project for a game adaptation of the series,{{cite news |last=Loo |first=Egan |date=June 8, 2012 |title=A Certain Magical Index Gets Game by Namco Bandai, Guyzware |url=https://www.animenewsnetwork.com/interest/2012-06-08/a-certain-magical-index-gets-game-by-namco-bandai-guyzware |work=Anime News Network |access-date=June 8, 2012 |archive-date=December 12, 2018 |archive-url=https://web.archive.org/web/20181212065435/https://www.animenewsnetwork.com/interest/2012-06-08/a-certain-magical-index-gets-game-by-namco-bandai-guyzware |url-status=live }} which was revealed to be a crossover visual novel game for PSP between A Certain Magical Index and A Certain Scientific Railgun franchises titled A Certain Magical and Scientific Ensemble.{{cite news |last=Loveridge |first=Lynzee |date=June 29, 2012 |title=A Certain Magical Index & Scientific Railgun Converge on PSP |url=https://www.animenewsnetwork.com/interest/2012-06-29/a-certain-magical-index-and-scientific-railgun-converge-on-psp |work=Anime News Network |access-date=September 26, 2012 |archive-date=December 12, 2018 |archive-url=https://web.archive.org/web/20181212044346/https://www.animenewsnetwork.com/interest/2012-06-29/a-certain-magical-index-and-scientific-railgun-converge-on-psp |url-status=live }} The game was released on February 21, 2013.{{cite news |last=Ransom |first=Ko |date=August 31, 2012 |title=A Certain Magical Index & Scientific Railgun Crossover Game Dated |url=https://www.animenewsnetwork.com/news/2012-08-30/a-certain-magical-index-and-scientific-railgun-crossover-game-dated |work=Anime News Network |access-date=June 14, 2021 |archive-date=June 13, 2021 |archive-url=https://web.archive.org/web/20210613183550/https://www.animenewsnetwork.com/news/2012-08-30/a-certain-magical-index-and-scientific-railgun-crossover-game-dated |url-status=live }} Heroz also developed an action puzzle game titled A Certain Magical and Scientific Puzzdex, which was published by ASCII Media Works in 2014.{{cite news |date=March 17, 2014 |script-title=ja:スマホ向けパズルゲーム「とある魔術と科学の謎解目録」Android版が配信中 |trans-title=Android version of "A Certain Magical and Scientific Puzzdex", a puzzle game for smartphones, is now available. |url=https://www.4gamer.net/games/251/G025100/20140317020/ |language=Japanese |work=4Gamer.net |access-date=July 8, 2021 |archive-date=June 29, 2021 |archive-url=https://web.archive.org/web/20210629191703/https://www.4gamer.net/games/251/G025100/20140317020/ |url-status=live }} NetEase Games developed a massively multiplayer online role-playing game based on the series with supervision from Kadokawa Corporation, titled A Certain Magical Index: Genuine Mobile Game, which was released to the Chinese market in 2017.{{cite news |date=July 21, 2016 |script-title=zh:角川正版《魔法禁书目录》正版手游制作决定 |trans-title=Kadokawa-certified "A Certain Magical Index" genuine mobile game production decision |url=http://bilibili.163.com/2016/07/21/22642_630765.html |language=Chinese |work=NetEase Games |access-date=February 22, 2024 |archive-date=May 4, 2017 |archive-url=https://web.archive.org/web/20170504110632/http://bilibili.163.com/2016/07/21/22642_630765.html |url-status=dead }}

On January 4, 2019, Square Enix released a teaser trailer that announced their game titled A Certain Magical Index: Imaginary Fest,{{cite news |last=Hodgkins |first=Crystalyn |date=January 5, 2019 |title=Square Enix Announces A Certain Magical Index: Imaginary Fest Smartphone Game |url=https://www.animenewsnetwork.com/news/2019-01-04/square-enix-announces-a-certain-magical-index-imaginary-fest-smartphone-game/.141668 |work=Anime News Network |access-date=June 3, 2021 |archive-date=June 3, 2021 |archive-url=https://web.archive.org/web/20210603064438/https://www.animenewsnetwork.com/news/2019-01-04/square-enix-announces-a-certain-magical-index-imaginary-fest-smartphone-game/.141668 |url-status=live }} which was released on July 4.{{Cite tweet |user=index_if_PR |number=1144515855197229056 |script-title=ja:⚡️正式サービス開始日決定⚡️『#とある魔術の禁書目録_幻想収束』7月4日サービス開始決定‼ |trans-title=⚡️The official service start date has been determined⚡️"#A Certain Magical Index_Imaginary Fest" will begin service on July 4th‼ |language=Japanese |access-date=April 11, 2021}} Fuji Shoji, a Japanese company known for their pachinko and pachislot products, released a teaser trailer on August 24, 2020, for the series' pachinko,{{cite news |date=August 25, 2020 |script-title=ja:『とある魔術の禁書目録』がついにパチンコに登場！ |trans-title="A Certain Magical Index" is finally available in pachinko! |url=https://dengekionline.com/articles/47757/ |language=Japanese |work=Dengeki Online |access-date=June 13, 2021 |archive-date=June 13, 2021 |archive-url=https://web.archive.org/web/20210613045233/https://dengekionline.com/articles/47757/ |url-status=live }} which was later launched in November.{{cite news |date=September 9, 2020 |script-title=ja:大人気ライトノベル、王道スペック・遊タイム搭載で待望のパチンコ化／『Pとある魔術の禁書目録』 |trans-title=Long-awaited pachinko version of popular light novel with royal specs and playtime / "A Certain Magical Index P" |url=https://web-greenbelt.jp/post-40984/ |language= |work=Greenbelt Web |access-date=June 13, 2021 |archive-date=June 24, 2021 |archive-url=https://web.archive.org/web/20210624194945/https://web-greenbelt.jp/post-40984/ |url-status=live }}{{cite web |url=https://www.p-world.co.jp/sp/kisyu.cgi?code=9248 |website=P-World |language=Japanese |script-title=ja:Pとある魔術の禁書目録 {{pipe}} P-WORLD パチンコ・パチスロ機種情報 |trans-title=A Certain Magical Index P {{pipe}} P-WORLD Pachinko / Pachislot Model Information |access-date=June 13, 2021 |archive-date=July 14, 2021 |archive-url=https://web.archive.org/web/20210714180256/https://www.p-world.co.jp/machine/database/9248 |url-status=live }} Sun Electronics adapted it into a mobile game and launched it on December 17, 2020.{{cite news |date=December 18, 2020 |script-title=ja:アプリ『Pとある魔術の禁書目録』iOS/Android版 配信開始のお知らせ |trans-title=App "A Certain Magical Index P" for iOS and Android is now available! |url=https://prtimes.jp/main/html/rd/p/000000006.000044075.html |language=Japanese |work=PR Times |access-date=June 13, 2021 |archive-date=June 13, 2021 |archive-url=https://web.archive.org/web/20210613045232/https://prtimes.jp/main/html/rd/amp/p/000000006.000044075.html |url-status=live }}

A radio drama was broadcast in Dengeki Taishō, narrating the story of an encounter with the mysterious self-proclaimed "former" sorcerer by Toma Kamijo and Index in a family restaurant after Mikoto Misaka decided to go back due to urgent business.{{cite web |url=http://www.project-index.net/drama_cd/index.php |website=project-index.net |language=Japanese |script-title=ja:とある魔術の禁書目録 公式ホームページ |trans-title=A Certain Magical Index Official Homepage |access-date=December 15, 2007 |url-status=dead |archive-url=https://web.archive.org/web/20071121014246/http://project-index.net/drama_cd/index.php |archive-date=November 21, 2007}} It was later released as a drama CD, which was included in the mail-in order of the 48th volume of Dengeki hp.{{cite web |url= http://lightnovel.g.hatena.ne.jp/CAX/20071004/p2 |publisher=Hatena Group |language=Japanese |script-title=ja:『とある魔術の禁書目録』ドラマCD |trans-title="A Certain Magical Index" Drama CD |access-date=December 15, 2007 |url-status=dead |archive-url=https://web.archive.org/web/20090216024139/http://lightnovel.g.hatena.ne.jp/CAX/20071004/p2 |archive-date=February 16, 2009}} The drama CD, which contains a new story about Misaka and Kuroko Shirai with their "urgent business" and a duel request by a Level 3 psychic girl from Tokiwadai Middle School, became available for purchase in December 2007.

Geneon Universal Entertainment (now NBCUniversal Entertainment Japan) released four audio dramas for the first season of Index under the title A Certain Magical Index Archives from March 25{{cite web |url=https://sp.shop.tsutaya.co.jp/cd/product/4988102576226/ |website=Tsutaya Online Shopping |language=Japanese |script-title=ja:とある魔術の禁書目録（インデックス）アーカイブズ1 |trans-title=A Certain Magical Index Archives 1 |access-date=June 15, 2021 |archive-date=June 15, 2021 |archive-url=https://web.archive.org/web/20210615034935/https://sp.shop.tsutaya.co.jp/cd/product/4988102576226/ |url-status=live }} to August 21, 2009.{{cite web |url=https://sp.shop.tsutaya.co.jp/cd/product/4988102576523/ |website=Tsutaya Online Shopping |language=Japanese |script-title=ja:とある魔術の禁書目録（インデックス）アーカイブス4 |trans-title=A Certain Magical Index Archives 4 |access-date=June 15, 2021 |archive-date=June 15, 2021 |archive-url=https://web.archive.org/web/20210615034951/https://sp.shop.tsutaya.co.jp/cd/product/4988102576523/ |url-status=live }} The same enterprise released another four audio dramas for the second season from May 25{{cite web |url=https://tower.jp/item/2833748/ |website=Tower Records Online |language=Japanese |script-title=ja:とある魔術の禁書目録II アーカイブス 1 |trans-title=A Certain Magical Index II Archives 1 |access-date=June 15, 2021 |archive-date=July 9, 2021 |archive-url=https://web.archive.org/web/20210709185308/https://tower.jp/item/2833748/ |url-status=live }} to August 24, 2011.{{cite web |url=https://tower.jp/item/2899461/ |website=Tower Records Online |language=Japanese |script-title=ja:とある魔術の禁書目録II アーカイブス 4 |trans-title=A Certain Magical Index II Archives 4 |access-date=June 15, 2021 |archive-date=July 9, 2021 |archive-url=https://web.archive.org/web/20210709190727/https://tower.jp/item/2899461/ |url-status=live }} A drama CD for A Certain Magical Index III was released as a bonus for customers who purchased the limited edition volume sets of the series via Amazon's Japanese website.{{cite news |date=January 29, 2019 |script-title=ja:amazon特典ドラマCDの内容決定！ |trans-title=The content of the Amazon bonus drama CD has been decided! |url=https://toaru-project.com/index_3/news/index00830000.html |language=Japanese |work=toaru-project.com/index_3 |access-date=June 15, 2021 |archive-date=June 15, 2021 |archive-url=https://web.archive.org/web/20210615034940/https://toaru-project.com/index_3/news/index00830000.html |url-status=live }}

Several characters from A Certain Magical Index cross over with other characters created by Kamachi in his light novel {{illm|The Circumstance Leading to a Simple Killer Princess' Marriage Was a Certain Magical Heavy Zashiki Warashi|ja|とある魔術のヘヴィーな座敷童が簡単な殺人妃の婚活事情}}, which was published on February 10, 2015.{{Cite web |language=Japanese |script-title=ja:とある魔術のヘヴィーな座敷童が簡単な殺人妃の婚活事情 |trans-title=The Circumstance Leading to a Simple Killer Princess' Marriage Was a Certain Magical Heavy Zashiki Warashi |url=https://dengekibunko.jp/product/index/312206500000.html |url-status=live |archive-url=https://web.archive.org/web/20220825132656/https://dengekibunko.jp/product/index/312206500000.html |archive-date=August 25, 2022 |access-date=August 25, 2022 |website=Dengeki Bunko}} As a collaboration with Sega's Virtual On video game franchise, Kamachi wrote the crossover light novel titled {{Nihongo|A Certain Magical Index × Cyber Troopers Virtual-On: A Certain Magical Virtual-On|とある魔術の禁書目録×電脳戦機バーチャロン とある魔術の電脳戦機|Toaru Majutsu no Indekkusu × Den'nō Senki Bācharon: Toaru Majutsu no Bācharon}} with mecha illustrations designed by Hajime Katoki, which was released on May 10, 2016.{{cite web |url=https://dengekibunko.jp/product/index/321601000499.html |title=Toaru Majutsu no Index x Dennō Senki Virtual-On: Toaru Majutsu no Virtual-On |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録×電脳戦機バーチャロン とある魔術の電脳戦機 |trans-title=A Certain Magical Index × Cyber Troopers Virtual-On: A Certain Magical Virtual-On |access-date=February 13, 2018 |archive-date=March 5, 2019 |archive-url=https://web.archive.org/web/20190305165241/https://dengekibunko.jp/product/index/321601000499.html |url-status=live }} One of Kamachi's light novel works, {{illm|Apocalypse Witch|ja|アポカリプス・ウィッチ 飽食時代の【最強】たちへ}}, crosses over with A Certain Magical Index under the title {{Nihongo|A Certain Magical Index × Apocalypse Witch Collaboration SS|とある魔術の禁書目録×アポカリプス・ウィッチ コラボSS}}, which was released in May 2020.{{cite news |date=May 7, 2020 |script-title=ja:『とある魔術の禁書目録』×『アポカリプス・ウィッチ』コラボ小説が無料公開！ |trans-title=The "A Certain Magical Index" × "Apocalypse Witch" collaboration novel is now available for free! |url=https://dengekionline.com/articles/35479/ |language=Japanese |work=Dengeki Online |access-date=June 10, 2021 |archive-date=June 10, 2021 |archive-url=https://web.archive.org/web/20210610130611/https://dengekionline.com/articles/35479/ |url-status=live }}

A manga adaptation of The Circumstance Leading to a Simple Killer Princess' Marriage Was a Certain Magical Heavy Zashiki Warashi was serialized on Monthly Shōnen Gangan from February 12{{Cite web |language=Japanese |script-title=ja:鎌池和馬の歴代キャラ大集合！オールスターノベルがガンガンでマンガ化 |trans-title=Kazuma Kamachi's all-star cast of characters! All-star novel is now a manga in Gangan |url=https://natalie.mu/comic/news/138231 |url-status=live |archive-url=https://web.archive.org/web/20191222224626/https://natalie.mu/comic/news/138231 |archive-date=December 22, 2019 |access-date=August 25, 2022 |website=Natalie}} to October 10, 2015.{{Cite web |language=Japanese |script-title=ja:少年ガンガン（２０１５年１１月号）|trans-title=Shōnen Gangan (November 2015 issue) |url=https://www.kinokuniya.co.jp/f/dsg-04-4910048711157 |url-status=live |archive-url=https://web.archive.org/web/20220824163356/https://www.kinokuniya.co.jp/f/dsg-04-4910048711157 |archive-date=August 24, 2022 |access-date=August 25, 2022 |website=Books Kinokuniya}} The first tankōbon volume was published on November 21, 2015,{{Cite web |url=https://magazine.jp.square-enix.com/top/comics/detail/9784757547940/ |publisher=Square Enix |language=Japanese |script-title=ja:とある魔術のヘヴィーな座敷童が簡単な殺人妃の婚活事情 1 |trans-title=A Certain Magical Heavy Zashiki-Warashi Deals with a Simple Killer Princess' Marriage Circumstances 1 |access-date=August 25, 2022 |url-status=live |archive-url=https://web.archive.org/web/20220824153240/https://magazine.jp.square-enix.com/top/comics/detail/9784757547940/ |archive-date=August 24, 2022}} and the final volume on December 22.{{Cite web |url=https://magazine.jp.square-enix.com/top/comics/detail/9784757548275/ |publisher=Square Enix |language=Japanese |script-title=ja:とある魔術のヘヴィーな座敷童が簡単な殺人妃の婚活事情 2 |trans-title=A Certain Magical Heavy Zashiki-Warashi Deals with a Simple Killer Princess' Marriage Circumstances 2 |access-date=August 25, 2022 |url-status=live |archive-url=https://web.archive.org/web/20220824153524/https://magazine.jp.square-enix.com/top/comics/detail/9784757548275/ |archive-date=August 24, 2022}} A manga adaptation of A Certain Magical Virtual-On began publication in ASCII Media Works' Monthly Denplay Comic magazine from March 10, 2018,{{cite web |url=https://www.kadokawa.co.jp/product/321712000673 |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録×電脳戦機バーチャロン とある魔術の電脳戦機（1） |trans-title=A Certain Magical Index x Cyber Troopers Virtual-On: A Certain Magical Virtual-On (1) |access-date=June 12, 2021 |archive-date=January 29, 2021 |archive-url=https://web.archive.org/web/20210129133026/https://www.kadokawa.co.jp/product/321712000673/ |url-status=live }} to June 26, 2019, with a total of three tankōbon volumes.{{cite web |url=https://www.kadokawa.co.jp/product/321902001093 |publisher=ASCII Media Works |language=Japanese |script-title=ja:とある魔術の禁書目録×電脳戦機バーチャロン とある魔術の電脳戦機（3） |trans-title=A Certain Magical Index x Cyber Troopers Virtual-On: A Certain Magical Virtual-On (3) |access-date=June 12, 2021 |archive-date=March 1, 2021 |archive-url=https://web.archive.org/web/20210301005649/https://www.kadokawa.co.jp/product/321902001093/ |url-status=live}}

The series is featured in Dengeki Gakuen RPG: Cross of Venus for the Nintendo DS, with Index appearing as a supporting character.{{cite web |url=https://www.amazon.co.jp/dp/B001HBIPOO |website=Amazon |language=Japanese |script-title=ja:電撃学園RPG Cross of Venus(通常版) 特典 電撃学園RPG文庫付き |trans-title=Dengeki Gakuen RPG: Cross of Venus (Normal Edition) with bonus Dengeki Gakuen RPG library |access-date=June 15, 2021 |archive-date=July 14, 2021 |archive-url=https://web.archive.org/web/20210714180304/https://www.amazon.co.jp/dp/B001HBIPOO |url-status=live }} The series was also adapted into Bushiroad's Weiß Schwarz collectible card game, which was released on April 24, 2010.{{cite web |url=http://ws-tcg.com/products/index_railgun.html |website=Weiß Schwarz |language=Japanese |script-title=ja:「禁書目録＆超電磁砲」 |trans-title=A Certain Magical Index & Railgun |access-date=March 29, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20130508112356/http://ws-tcg.com/products/index_railgun.html |archive-date=May 8, 2013}} Index also makes a cameo appearance in the Oreimo PSP game.{{cite news |date=November 26, 2010 |script-title=ja:地味な幼なじみもぬるっと動く!! そしてPSPより先に桐乃が...... |trans-title=The humble childhood friend also moves in a slimy way! And Kirino before the PSP: ...... |url=https://dengekionline.com/elem/000/000/323/323077/index-2.html |language=Japanese |work=Dengeki Online |access-date=June 15, 2021 |archive-date=December 2, 2020 |archive-url=https://web.archive.org/web/20201202091315/https://dengekionline.com/elem/000/000/323/323077/index-2.html |url-status=live }} Sega's Dengeki Bunko: Fighting Climax brings Mikoto Misaka as a playable character, while Toma Kamijo and Accelerator are assist characters.{{cite news |date=October 5, 2013 |title=Mikoto Misaka and Kirino Kosaka Announced as Playable Characters in Dengeki Bunko FIGHTING CLIMAX, Four Support Characters Revealed |url=http://shoryuken.com/2013/10/05/mikoto-misaka-and-kirino-kosaka-announced-as-playable-characters-in-dengeki-bunko-fighting-climax-four-assist-characters-revealed/ |url-status=dead |work=Shoryuken |archive-url=https://web.archive.org/web/20131009055714/http://shoryuken.com/2013/10/05/mikoto-misaka-and-kirino-kosaka-announced-as-playable-characters-in-dengeki-bunko-fighting-climax-four-assist-characters-revealed/ |archive-date=October 9, 2013 |access-date=February 11, 2014}} Sega and Dengeki Bunko later collaborated to develop A Certain Magical Virtual-On for the PlayStation 4 and PlayStation Vita,{{cite news |last=Hodgkins |first=Crystalyn |date=March 12, 2017 |title=Sega, Dengeki Bunko Develop A Certain Magical Virtual-On Collaboration Game For PS4, PS Vita |url=https://www.animenewsnetwork.com/news/2017-03-12/sega-dengeki-bunko-develop-a-certain-magical-virtual-on-collaboration-game-for-ps4-ps-vita/.113324 |work=Anime News Network |access-date=September 24, 2017 |archive-date=July 29, 2019 |archive-url=https://web.archive.org/web/20190729014437/https://www.animenewsnetwork.com/news/2017-03-12/sega-dengeki-bunko-develop-a-certain-magical-virtual-on-collaboration-game-for-ps4-ps-vita/.113324 |url-status=live }} which was released on February 15, 2018.{{cite news |date=August 22, 2017 |script-title=ja:『とある魔術のバーチャロン』インデックス専用機が判明。キャラの能力を反映した第4の兵装が明らかに |trans-title="A Certain Magical Virtual-On" Index's exclusive machine has been revealed. A fourth armament that reflects the character's abilities is revealed. |url=https://dengekionline.com/elem/000/001/577/1577704/ |language=Japanese |work=Dengeki Online |access-date=February 13, 2018 |archive-date=February 5, 2019 |archive-url=https://web.archive.org/web/20190205231029/http://dengekionline.com/elem/000/001/577/1577704/ |url-status=live }} Toma, Mikoto, Accelerator, Kuroko Shirai, and Kazari Uiharu appear as playable characters in Dengeki Bunko: Crossing Void, a 2018 mobile game developed by 91Act and Sega.{{Cite web |date=September 10, 2019 |title=Trailer of Crossing Void - Global Version |url=https://m.youtube.com/watch?v=90em4yBbrZg |url-status=live |archive-url=https://web.archive.org/web/20220121043007/https://www.youtube.com/watch?v=90em4yBbrZg |archive-date=January 21, 2022 |access-date=January 21, 2022 |publisher=Crossing Void Global - Official |via=YouTube}}

The light novel series has consistently ranked in the top ten light novels in Takarajimasha's guidebook Kono Light Novel ga Sugoi!. Notably, the series ranked first in 2011,{{cite book|title=Kono Light Novel ga Sugoi! 2011|publisher=Takarajimasha|isbn=978-4-7966-7963-3|date=November 19, 2010|language=ja}} while also ranking in the top three in 2012, 2013, 2014, and 2017.Kono Light Novel ga Sugoi! volumes:{{ubl|{{cite book|title=Kono Light Novel ga Sugoi! 2012|publisher=Takarajimasha|isbn=978-4-7966-8716-4|date=November 19, 2011|language=ja}}|{{cite book|title=Kono Light Novel ga Sugoi! 2013|publisher=Takarajimasha|isbn=978-4-8002-0357-1|date=November 19, 2012|language=ja}}|{{cite book|title=Kono Light Novel ga Sugoi! 2014|publisher=Takarajimasha|isbn=978-4-8002-1954-1|date=November 20, 2013|language=ja}}|{{cite book|title=Kono Light Novel ga Sugoi! 2017|publisher=Takarajimasha|isbn=978-4-8002-6345-2|date=November 24, 2016|language=ja}}}} In 2020, the series was inducted into the hall of fame, thus barred from ranking in future years.{{cite book|title=Kono Light Novel ga Sugoi! 2020|publisher=Takarajimasha|isbn=978-4-8002-9978-9|date=November 25, 2019|language=ja}} Kamachi, Haimura, and several of the series' characters have also ranked in the guidebook, notably with Mikoto Misaka winning the award for best female character nine times in ten years.{{cite web|title=After Near 10 Year Streak, Misaka Loses Her Top Spot in Kono Light Novel ga Sugoi!'s Character Ranking|url=https://www.animenewsnetwork.com/interest/2019-11-27/after-near-10-year-streak-misaka-loses-her-top-spot-in-kono-light-novel-ga-sugoi-s-character-ranking/.153704|website=Anime News Network|last=Morrissy|first=Kim|date=November 27, 2019|access-date=June 11, 2021|archive-date=April 17, 2021|archive-url=https://web.archive.org/web/20210417075327/https://www.animenewsnetwork.com/interest/2019-11-27/after-near-10-year-streak-misaka-loses-her-top-spot-in-kono-light-novel-ga-sugoi-s-character-ranking/.153704|url-status=live}}

In Kadokawa Shoten's Light Novel Award contest held in 2007, A Certain Magical Index was a runner-up in the action category.{{cite web|url=http://www.kadokawa.co.jp/lightnovel-award/|script-title=ja:ライトノベルアワード2007|trans-title=Light Novel Award 2007|publisher=Kadokawa Shoten|archive-url=https://web.archive.org/web/20120214011528/http://www.kadokawa.co.jp/lightnovel-award/|access-date=January 30, 2011|archive-date=February 14, 2012|language=ja}} The series also ranked in Kadokawa Light Novel Expo 2020's top light novels in the infinite passion category.{{cite web|archive-url=https://web.archive.org/web/20210126033351/https://lnexpo.kimirano.jp/plan/selection/?b=09|script-title=ja:『らのすぽベストセレクション2020』結果発表 |trans-title=Announcing the results of "Ranosupo Best Selection 2020" |publisher=Kadokawa Light Novel Expo|language=ja|access-date=June 11, 2021|archive-date=January 26, 2021|url=https://lnexpo.kimirano.jp/plan/selection/?b=09}}

In May 2010, it was reported that A Certain Magical Index became Dengeki Bunko's number one bestseller and it became the first Dengeki Bunko series to sell over 10 million copies.{{cite web|url=http://temple-knights.com/archives/2010/05/machiasobi-20100503.html|script-title=ja:1億部突破の電撃文庫で最も売れたのは『とある魔術の禁書目録』|trans-title=The best-selling Dengeki Bunko with over 100 million copies was "A Certain Magical Index"|website=Temple Knights|date=May 5, 2010|access-date=August 16, 2010|language=ja|archive-date=April 14, 2019|archive-url=https://web.archive.org/web/20190414180033/https://temple-knights.com/archives/2010/05/machiasobi-20100503.html|url-status=live}}{{cite web|script-title=ja:とある魔術の禁書目録：6年半で1000万部到達 電撃文庫創刊17年で初|trans-title=A Certain Magical Index: 10 million copies sold in 6.5 years, first in 17 years of Dengeki Bunko publication|url=https://mantan-web.jp/article/20101027dog00m200027000c.html|website=Mantan Web|date=October 27, 2010|access-date=June 13, 2021|language=ja|archive-date=June 25, 2021|archive-url=https://web.archive.org/web/20210625022009/https://mantan-web.jp/article/20101027dog00m200027000c.html|url-status=live}} Later that year, it became the fifth best-selling light novel in Japan, beating other popular series such as Full Metal Panic! and Haruhi Suzumiya.{{cite web|url=http://grev.g.hatena.ne.jp/keyword/lightnovelnumbers?kid=135|script-title=ja:ライトノベルの発行部数：シリーズ総計の目安|trans-title=Number of copies of light novels published: Approximate total number of series.|publisher=Hatena Group|archive-url=https://web.archive.org/web/20130826131243/http://grev.g.hatena.ne.jp/keyword/lightnovelnumbers?kid=135|access-date=August 16, 2010|archive-date=August 26, 2013|language=ja}} It was reported in October 2014 that the entire franchise, including the light novels and manga, had sold over 28 million copies.{{cite web|url=https://animeanime.jp/article/2014/10/14/20487.html|script-title=ja:「とある魔術の禁書目録」10周年イベント 「ヘヴィーオブジェクト」のアニメ化を発表|trans-title="A Certain Magical Index" 10th Anniversary Event: "Heavy Object" Anime Adaptation Announced|website=Anime! Anime!|date=October 14, 2014 |access-date=July 16, 2018|language=ja|archive-date=May 11, 2019|archive-url=https://web.archive.org/web/20190511221204/https://animeanime.jp/article/2014/10/14/20487.html|url-status=live}} It was reported in August 2017 that the light novels have sold over 16.35 million copies.{{cite web|url=http://asciimw.jp/info/release/pdf/20170810.pdf|script-title=ja:電撃文庫 2017年夏のフェア|trans-title=Dengeki Bunko 2017 Summer Fair|publisher=Kadokawa Corporation|language=ja|access-date=February 25, 2024|archive-date=September 8, 2017|archive-url=https://web.archive.org/web/20170908220444/http://asciimw.jp/info/release/pdf/20170810.pdf|url-status=dead}} In July 2018, the series was reported to have sold over 30 million copies.{{cite web|url=https://natalie.mu/music/news/290334|script-title=ja:「とある魔術の禁書目録」第3期、主題歌アーティストは黒崎真音＆井口裕香|trans-title=The third season of "A Certain Magical Index", the theme song artists are Maon Kurosaki and Yuka Iguchi.|website=Natalie|date=July 9, 2018|access-date=July 11, 2018|language=ja|archive-date=July 11, 2018|archive-url=https://web.archive.org/web/20180711185250/https://natalie.mu/music/news/290334|url-status=live}} It was reported with the release of Sorcery Hacker >> Divulge the Magic Vulnerability that the physical sales of the series had reached 18 million copies.{{cite book |language=ja |script-title=ja:魔導ハッカー〉〉暴け、魔法の脆弱性を (LINE文庫エッジ) |trans-title=Sorcery Hacker >> Divulge the Magic Vulnerability (LINE Bunko Edge) |id={{ASIN|4908588767|country=jp}} }} As of May 2021, it was reported that the light novel, manga, and spin-off series reached 31 million copies.

Matthew Warner from The Fandom Post rated the first volume of the light novel an 'A', calling it a "fantastic start".{{cite web|title=A Certain Magical Index Vol. #01 Novel Review|url=https://www.fandompost.com/2015/04/10/a-certain-magical-index-vol-01-novel-review/|website=The Fandom Post|last=Warner|first=Matthew|date=April 10, 2015|access-date=June 11, 2021|archive-date=August 22, 2017|archive-url=https://web.archive.org/web/20170822162456/http://www.fandompost.com/2015/04/10/a-certain-magical-index-vol-01-novel-review/|url-status=live}} Sean Gaffney from A Case Suitable for Treatment also praised it, calling it a "solid beginning", while also noted that it can be a bit slow at times.{{cite web|title=A Certain Magical Index, Vol. 1|url=http://suitablefortreatment.mangabookshelf.com/2014/11/27/a-certain-magical-index-vol-1/|website=A Case Suitable for Treatment|last=Gaffney|first=Sean|date=November 27, 2014|access-date=June 11, 2021|archive-date=June 10, 2021|archive-url=https://web.archive.org/web/20210610222611/http://suitablefortreatment.mangabookshelf.com/2014/11/27/a-certain-magical-index-vol-1/|url-status=live}} Theron Martin from Anime News Network also praised it for the concept, as well as for keeping Toma Kamijo balanced, while also criticizing the illustrations.{{cite web|title=A Certain Magical Index Novel 1 Review|url=https://www.animenewsnetwork.com/review/a-certain-magical-index/novel-1/.82600|website=Anime News Network|last=Martin|first=Theron|date=December 26, 2014|access-date=June 11, 2021|archive-date=June 10, 2021|archive-url=https://web.archive.org/web/20210610222609/https://www.animenewsnetwork.com/review/a-certain-magical-index/novel-1/.82600|url-status=live}}

Richard Gutierrez from The Fandom Post praised the premise of the manga, but criticized the execution due to the lack of background it provides.{{cite web|title=A Certain Magical Index Vol. #01 Manga Review|url=https://www.fandompost.com/2015/08/06/a-certain-magical-index-vol-01-manga-review/|website=The Fandom Post|last=Gutierrez|first=Richard|date=August 6, 2015|access-date=June 11, 2021}} Leroy Douresseaux from Comic Book Bin praised the volume he reviewed, stating the art by Chuya Kogino fits the series perfectly.{{cite web|title=A Certain Magical Index: Volume 21 manga review|url=http://www.comicbookbin.com/certainmagicalindex021.html|website=Comic Book Bin|last=Douresseaux|first=Leroy|date=April 28, 2020|access-date=June 11, 2021|archive-date=June 10, 2021|archive-url=https://web.archive.org/web/20210610222616/http://www.comicbookbin.com/certainmagicalindex021.html|url-status=live}} However, Erkael from Manga News was more critical, specifically for the artwork, but he did praise the story and concept.{{cite web|title=A Certain Magical Index Vol.1|url=https://www.manga-news.com/index.php/manga/critique/A-Certain-Magical-Index/vol-1|website=Manga News|author=Erkael|date=July 20, 2012|access-date=June 11, 2021|language=fr|archive-date=June 10, 2021|archive-url=https://web.archive.org/web/20210610222617/https://www.manga-news.com/index.php/manga/critique/A-Certain-Magical-Index/vol-1|url-status=live}}

Chris Beveridge from The Fandom Post praised the anime adaptation, calling it a "fun series" and "pretty engaging".{{cite web|title=A Certain Magical Index Season 1 Complete Collection Blu-Ray Anime Review|url=https://www.fandompost.com/2014/12/19/a-certain-magical-index-season-1-complete-collection-blu-ray-anime-review/|website=The Fandom Post|last=Beveridge|first=Chris|date=December 19, 2014|access-date=June 11, 2021|archive-date=January 27, 2021|archive-url=https://web.archive.org/web/20210127102036/https://www.fandompost.com/2014/12/19/a-certain-magical-index-season-1-complete-collection-blu-ray-anime-review/|url-status=live}} Ian Wolf from Anime UK News also praised the series, specifically for the action, while calling the music "[just] okay".{{cite web|title=A Certain Magical Index|url=https://animeuknews.net/2015/09/a-certain-magical-index/|website=Anime UK News|last=Wolf|first=Ian|date=September 15, 2015|access-date=June 11, 2021|archive-date=June 10, 2021|archive-url=https://web.archive.org/web/20210610222615/https://animeuknews.net/2015/09/a-certain-magical-index/|url-status=live}} Like Beveridge and Wolf, Carl Kimlinger from Anime News Network also offered praise to the series for the characters and action, while criticizing for being a bit generic at times.{{cite web|title=A Certain Magical Index Episodes 1–14 Streaming Review|url=https://www.animenewsnetwork.com/review/a-certain-magical-index/episodes-1|website=Anime News Network|last=Kimlinger|first=Carl|date=July 2, 2012|access-date=June 11, 2021|archive-date=May 2, 2021|archive-url=https://web.archive.org/web/20210502043409/https://www.animenewsnetwork.com/review/a-certain-magical-index/episodes-1|url-status=live}} Like Kimlinger, Theron Martin from the same website also praised the action and characters, while criticizing it for feeling preachy at times.{{cite web|title=A Certain Magical Index II BD+DVD – Complete Collection Review|url=https://www.animenewsnetwork.com/review/a-certain-magical-index-ii/bd-dvd-complete-collection/.105595|website=Anime News Network|last=Martin|first=Theron|date=August 23, 2016|access-date=June 11, 2021|archive-date=April 15, 2021|archive-url=https://web.archive.org/web/20210415193703/https://www.animenewsnetwork.com/review/a-certain-magical-index-ii/bd-dvd-complete-collection/.105595|url-status=live}} André Van Renssen from Active Anime called the series "a decent show", comparing it to Shakugan no Shana for its action. Despite that, they also criticized the series for being too violent at times.{{cite web|title=A Certain Magical Index Part 1|url=http://activeanime.com/html/2013/05/05/a-certain-magical-index-part-1/|website=Active Anime|last=Von Renssen|first=André|date=May 5, 2013|archive-url=https://web.archive.org/web/20160323000214/http://activeanime.com/html/2013/05/05/a-certain-magical-index-part-1/|access-date=June 11, 2021|archive-date=March 23, 2016}}{{cite web|title=A Certain Magical Index — Part 2|url=http://activeanime.com/html/2013/05/05/a-certain-magical-index-part-2/|website=Active Anime|last=Von Renssen|first=André|date=May 5, 2013|archive-url=https://web.archive.org/web/20160322234235/http://activeanime.com/html/2013/05/05/a-certain-magical-index-part-2/|access-date=June 11, 2021|archive-date=March 22, 2016}}

{{notelist}}

{{reflist}}

• {{Official website|https://toaru-project.com/}} {{in lang|ja}}
• {{Anime News Network|light novel|12545}}

{{Kazuma Kamachi}}

{{Monthly Shōnen Gangan}}

{{J.C.Staff}}

{{Hiroshi Nishikiori}}

{{Hiroyuki Yoshino}}

{{Portal bar|Japan|Anime and manga|Video games|Christianity}}

{{DEFAULTSORT:Certain Magical Index, A}}

Category:2004 Japanese novels

Category:2007 manga

Category:2008 anime television series debuts

Category:2011 Japanese novels

Category:2016 Japanese novels

Category:Action anime and manga

Category:ASCII Media Works manga

Category:Book series introduced in 2004

Category:Dengeki Bunko

Category:Dengeki Daioh

Category:AT-X (TV network) original programming

Category:Fiction books about psychic powers

Category:Funimation

Category:Gangan Comics manga

Category:Fiction about genetic engineering

Category:J.C.Staff

Category:Kadokawa Corporation franchises

Category:Light novels

Category:Muse Communication

Category:NBCUniversal Entertainment Japan

Category:Anime and manga set in schools

Category:Science fantasy anime and manga

Category:Shōnen manga

Category:Square Enix franchises

Category:Television shows based on light novels

Category:Warner Entertainment Japan franchises

Category:Works published under a pseudonym

Category:Yen Press titles