@onefive

The name @onefive was chosen because the members were 15 years old at the time of formation,{{Cite web |date=2020-05-27 |title=15歳の思春期レディ @ onefive 降誕！6月24日1stシングル「まだ見ぬ世界」でCDデビュー！ビジュアルも解禁！ |url=https://prtimes.jp/main/html/rd/p/000000294.000002883.html |url-status=live |archive-url=https://web.archive.org/web/20240104190955/https://prtimes.jp/main/html/rd/p/000000294.000002883.html |archive-date=2024-01-04 |access-date=2023-12-29 |website=PR Times |language=ja-JP}}{{Cite web |date=2023-05-24 |title=@ onefive、初のオープンスペースライブにワクワク「温かい方ばかりで嬉しくなりました」 |url=https://girlsnews.tv/unit/416318 |url-status=live |archive-url=https://web.archive.org/web/20240104191107/https://girlsnews.tv/unit/416318 |archive-date=2024-01-04 |access-date=2023-12-29 |website=GirlsNews |language=ja}} and because it can be pronounced in Japanese as ichi-go ({{literal translation}} 'one-five'), referring to the concept of ichi-go ichi-e, which the members value.{{Cite web |date=2020-06-22 |title=【前編】高校生のゆるふわカッコいいガールズユニット「@onefive」インタビュー！ 「まだ見ぬ世界」でCDデビューする４人の魅力に迫る |url=https://ranran-entame.com/close/67332.html |url-status=live |archive-url=https://web.archive.org/web/20240227190141/https://ranran-entame.com/close/67332.html |archive-date=2024-02-27 |access-date=2024-02-27 |website=RanRan Entertainment |language=ja}} The "@" symbol, which is silent, was included in the name to mean "from us" and "now from this place".{{Cite web |title=@onefive |url=https://avexnet.jp/contents/music_j/ONEFV-OFCL-0001/ |url-status=live |archive-url=https://web.archive.org/web/20240104191218/https://avexnet.jp/contents/music_j/ONEFV-OFCL-0001/ |archive-date=2024-01-04 |access-date=2023-12-28 |website=Avex Portal |language=ja}} Fans of @onefive are collectively referred to as @fifth.{{Cite web |last=ポッター |first=平井 |date=2023-09-08 |title=【@onefiveインタビュー】 「チョコミント」に「ホラー映画」メンバー4人は好き？嫌い？ |url=https://www.galpo.info/feature/702/list/8183 |url-status=live |archive-url=https://web.archive.org/web/20240320173834/https://www.galpo.info/feature/702/list/8183 |archive-date=2024-03-20 |access-date=2024-03-20 |website=Galpo |language=ja}}

@onefive was formed in October 2019 by four graduating members of the Japanese idol group Sakura Gakuin,{{Cite web |date=2023-03-08 |title=@onefive、あふれる思いを歌に乗せて届けた初ワンマン |url=https://natalie.mu/music/news/468546 |url-status=live |archive-url=https://web.archive.org/web/20240104191647/https://natalie.mu/music/news/468546 |archive-date=2024-01-04 |access-date=2023-12-29 |website=Natalie |publisher=Natasha, Inc. |language=ja}} including Kano Fujihira, who was one of the kawaii metal band Babymetal's three rotating "Avengers" support dancers.{{Cite web |date=2023-04-03 |title=BABYMETAL Officially Welcomes New Third Member, MOMOMETAL |url=https://blabbermouth.net/news/babymetal-officially-welcomes-new-third-member-momometal |url-status=live |archive-url=https://web.archive.org/web/20240104192315/https://blabbermouth.net/news/babymetal-officially-welcomes-new-third-member-momometal |archive-date=2024-01-04 |access-date=2023-12-29 |website=Blabbermouth |language=en}} On October 15, 2019, the group created social media accounts on Twitter, Instagram, and YouTube, but the identities of its members were kept secret.{{Cite web |date=2019-11-26 |title=さくら学院、@onefiveの今後の展開は？ ユニット特性を"部活動"の歴史から紐解く |url=https://realsound.jp/2019/11/post-451059_2.html |url-status=live |archive-url=https://web.archive.org/web/20240104192602/https://realsound.jp/2019/11/post-451059_2.html |archive-date=2024-01-04 |access-date=2023-12-30 |website=Real Sound |language=ja}} On October 19, 2019, while the members were still in Sakura Gakuin, their identities were revealed during the Sakura Gakuin Festival 2019 at the Kanagawa Arts Theatre. During the encore of the show, after performing as members of Sakura Gakuin, they performed their debut single "Pinky Promise" as @onefive for the first time. The choreography for the single was created by Mikiko.{{Cite web |date=2019-10-19 |title=@onefiveの正体が明らかに「Pinky Promise」MV公開 |url=https://natalie.mu/music/news/352136 |url-status=live |archive-url=https://web.archive.org/web/20240104193336/https://natalie.mu/music/news/352136 |archive-date=2024-01-04 |access-date=2023-12-30 |website=Natalie |publisher=Natasha, Inc. |language=ja}} "Pinky Promise" was released as a digital single on the following day, October 20, 2019, officially marking @onefive's debut.{{Cite web |date=2024-08-17 |title=@onefive LIVEHOUSE TOUR 2024 "Classy Crush"ーー5th Anniversary "5555" 開催決定！！！！ |url=https://onefive-web.jp/news/detail.php?id=1118595 |url-status=live |archive-url=https://web.archive.org/web/20241007154344/https://onefive-web.jp/news/detail.php?id=1118595 |archive-date=October 7, 2024 |access-date=2024-10-19 |website=@onefive Official Site |language=ja }}

Shortly after its formation, the group was unable to perform in-person events due to the COVID-19 pandemic,{{Cite web |date=2022-09-02 |title=【@onefive：インタビュー】待望の初有観客ライブを収めたBlu-rayが8/31にリリース。KANO・MOMO・SOYO・GUMI、4人が奏でる魅力の全てがここに集約されています！ |url=https://kukkatokyo.com/articles/5244/ |url-status=live |archive-url=https://web.archive.org/web/20231229044506/https://kukkatokyo.com/articles/5244/ |archive-date=2023-12-29 |access-date=2024-02-28 |website=Kukka Tokyo |language=ja}} relying instead on an online presence to hold virtual events. Notable virtual events included the release event for the CD single "Mada Minu Sekai" (まだ見ぬ世界) on July 19, 2020,{{Cite web |date=2020-07-19 |title=@onefive初イベントで新曲お披露目「これからも"まだ見ぬ世界"を更新していきます」 |url=https://natalie.mu/music/news/388372 |url-status=live |archive-url=https://web.archive.org/web/20240104193545/https://natalie.mu/music/news/388372 |archive-date=2024-01-04 |access-date=2023-12-31 |website=Natalie |publisher=Natasha, Inc. |language=ja}} and the concert @onefive Online Live: Blue Winter 2020 on December 22, 2020.{{Cite web |date=2022-11-20 |title=12月22日（火）@onefive 2度目の無観客オンラインイベント"Blue Winter 2020"開催決定！ |url=https://www.amuse.co.jp/topics/2020/11/onefive_bluewinter2020.html |url-status=dead |archive-url=https://web.archive.org/web/20240104193806/https://www.amuse.co.jp/topics/2020/11/onefive_bluewinter2020.html |archive-date=2024-01-04 |access-date=2023-12-31 |website=Amuse |language=ja}} The music video for the song "Mada Minu Sekai" was recorded by the four members at their own homes during the pandemic.{{Cite web |last=釣本 |first=知子 |date=2023-04-08 |title="推し武道"出演で話題のガールズグループ・@onefiveのSOYO「私たちも武道館に行きたいです！」【制服の彼女】 |url=https://wpb.shueisha.co.jp/news/entertainment/2023/04/08/119060/ |url-status=live |archive-url=https://web.archive.org/web/20240128224014/https://wpb.shueisha.co.jp/news/entertainment/2023/04/08/119060/ |archive-date=2024-01-28 |access-date=2024-01-28 |website=Weekly Playboy |publisher=Shueisha |language=ja}}

In January 2021, @onefive collaborated with the Japanese fashion brand Apres Jour for the outfits worn in the music video for "BBB". The choreography for the song was created by Minako "Maru" Maruyama of Elevenplay.{{Cite web |date=2021-01-28 |title=＠onefive、2ndシングル『BBB』リリース apres jourとコラボした新アー写＆告知映像も |url=https://realsound.jp/2021/01/post-698531.html |url-status=live |archive-url=https://web.archive.org/web/20240120152327/https://realsound.jp/2021/01/post-698531.html |archive-date=2024-01-20 |access-date=2024-01-20 |website=Real Sound |language=ja}}

On November 1, 2021, the song "Just for You" was featured in the Christmas commercial of the Japanese jewelry brand The Kiss.{{Cite web |date=2021-11-01 |title=11/1（月）公開！ 《THE KISS》 2021年クリスマスCM |url=https://newscast.jp/news/3892000 |url-status=live |archive-url=https://web.archive.org/web/20240104193941/https://newscast.jp/news/3892000 |archive-date=2024-01-04 |access-date=2023-12-31 |website=Newscast |publisher=The Kiss, Inc. |language=ja}}{{Cite web |date=2021-12-17 |title=鈴木美羽＆松島庄汰 ジュエリーブランド「THE KISS」2021年クリスマスCMに出演中！YouTubeタイアップ企画も公開！ |url=https://www.amuse.co.jp/topics/2021/12/_the_kiss2021sm.html |url-status=live |archive-url=https://web.archive.org/web/20240104194219/https://www.amuse.co.jp/topics/2021/12/_the_kiss2021sm.html |archive-date=2024-01-04 |access-date=2024-01-01 |website=Amuse |language=ja}}

On November 24, 2021, the digital single "Underground" was released, which marked the first time that the members of @onefive created their own choreography. They were also deeply involved in the production process of the music video, sharing their ideas on hairstyles, makeup, outfits, visuals, and cuts. The participation of the members in "Underground" was documented, with an emphasis on the choreography, in a four-part documentary series released on YouTube, titled Their Underground (彼女たちのUnderground, Kanojo-tachi no Underground).{{Cite web |date=2021-11-27 |title=@onefive、生配信でセルフプロデュース曲「Underground」初披露 来年初のアルバムリリース＆有観客ワンマン開催も発表 |url=https://lp.p.pia.jp/article/news/209567/index.html?detail=true |url-status=live |archive-url=https://web.archive.org/web/20240104194321/https://lp.p.pia.jp/article/news/209567/index.html?detail=true |archive-date=2024-01-04 |access-date=2023-12-31 |website=Pia |language=ja}}{{Cite web |last=Murata |first=Kamome |date=2021-11-24 |title=@onefive、グループの進化を自ら作り上げる姿勢 楽曲やメンバー考案振付による「Underground」での挑戦 |url=https://realsound.jp/2021/11/post-910203.html |url-status=live |archive-url=https://web.archive.org/web/20240104194526/https://realsound.jp/2021/11/post-910203.html |archive-date=2024-01-04 |access-date=2023-12-29 |website=Real Sound |language=ja}}

On February 2, 2022, @onefive released its first studio album, titled 1518, and pronounced ichi-go ichi-e.{{Cite web |date=2022-01-05 |title=@onefive、1stアルバム「1518」の新ビジュアル公開 |url=https://ototoy.jp/news/104899 |url-status=live |archive-url=https://web.archive.org/web/20240104194747/https://ototoy.jp/news/104899 |archive-date=2024-01-04 |access-date=2023-12-29 |website=Ototoy |language=ja}} The "18" in the title represented the age that the members would be turning in the year of the album's release.{{Cite web |date=2022-02-02 |title=@onefiveが1stアルバム「1518」本日リリース、リード曲MVを高校生と共同制作 |url=https://natalie.mu/music/news/464086 |url-status=live |archive-url=https://web.archive.org/web/20240104195301/https://natalie.mu/music/news/464086 |archive-date=2024-01-04 |access-date=2023-12-29 |website=Natalie |publisher=Natasha, Inc. |language=ja}} The song "1518" on the album marked the first time that the members wrote their own lyrics.{{Cite web |date=2022-02-02 |title=@onefive、"一期一会"で気づいた発信の大切さとグループの武器 1stアルバム『1518』インタビュー |url=https://realsound.jp/2022/02/post-959732.html |url-status=live |archive-url=https://web.archive.org/web/20240104195429/https://realsound.jp/2022/02/post-959732.html |archive-date=2024-01-04 |access-date=2023-12-29 |website=Real Sound |language=ja}} The album also highlighted @onefive's desire to be "a group that grows up with the same generation".{{Cite web |date=2022-02-02 |title=@onefiveが1stアルバム「1518」本日リリース、リード曲MVを高校生と共同制作 |url=https://lp.p.pia.jp/shared/cnt-s/cnt-s-11-02_2_354ff9df-2c32-4bd7-af4e-afea2d751e71.html |url-status=live |archive-url=https://web.archive.org/web/20240104195717/https://lp.p.pia.jp/shared/cnt-s/cnt-s-11-02_2_354ff9df-2c32-4bd7-af4e-afea2d751e71.html |archive-date=2024-01-04 |access-date=2024-01-02 |website=Pia |language=ja}} All of the songs apart from "1518" had their lyrics primarily written by a female high school student and singer-songwriter called Yura, who was the same age as the members of @onefive. Yura always included the opinions and thoughts of the members in the lyrics.{{Cite web |date=2020-05-28 |title=アーティスト @onefive |url=https://www.gamo.co.jp/gamo-news/9662/ |url-status=dead |archive-url=https://web.archive.org/web/20240104200111/https://www.gamo.co.jp/gamo-news/9662/ |archive-date=2024-01-04 |access-date=2024-01-02 |website=Gamo |language=ja}} Furthermore, the music video for "Lalala Lucky" was produced in collaboration with students of N High School and in cooperation with Adobe.{{Cite web |date=2022-02-02 |title=高校生ガールズユニット「@onefive」新作ミュージックビデオ制作にN高生6名が参加〜Adobe Creative Cloudを活用し、ポップでキュートな世界観を表現〜 |url=https://nnn.ed.jp/news/blog/archives/14468/ |url-status=live |archive-url=https://web.archive.org/web/20240104200429/https://nnn.ed.jp/news/blog/archives/14468/ |archive-date=2024-01-04 |access-date=2024-01-02 |website=N高等学校・S高等学校 |publisher=Kadokawa Dwango Educational Institute |language=ja}}{{Cite web |date=2022-02-02 |title=@onefive、1st アルバム『1518』からリード曲「Lalala Lucky」MV公開 N高等学校＆アドビとのコラボが実現 |url=https://realsound.jp/2022/02/post-960450.html |url-status=live |archive-url=https://web.archive.org/web/20240104200552/https://realsound.jp/2022/02/post-960450.html |archive-date=2024-01-04 |access-date=2024-01-02 |website=Real Sound |language=ja}} "Lalala Lucky" was also featured in a web commercial for the Japanese hair dye brand Beautylabo.{{Cite web |date=2022-02-02 |title=本日@onefive念願の1st Album「1518」発売！リード曲のMVも公開！ |url=https://www.oricon.co.jp/press/30/ |url-status=live |archive-url=https://web.archive.org/web/20240215214600/https://www.oricon.co.jp/press/30/ |archive-date=2024-02-15 |access-date=2024-02-15 |website=Oricon News}}

On February 20, 2022, as the circumstances surrounding the COVID-19 pandemic continued to change, the group was able to hold its first in-person solo concert with an audience, titled @onefive 1st Live: 1518, in Osaka at the Umeda Club Quattro. This was followed by a second concert under the same title on March 6, 2022, in Tokyo at the Shibuya Club Quattro. During the second concert, @onefive performed a dance to the song "Let Me Go" by Yūki Tsujimura, who was prominently involved in the music production of the first album. The choreography and stage lighting for the dance performance were produced by Kano Fujihira.

@onefive's first festival performance was at Super Mawa Loop Osaka 2022 on May 8.{{Cite web |last=Ato |first=Daishi |date=2022-06-10 |title=史上最大規模での開催、『SUPER MAWA LOOP OSAKA 2022』2日目・なんばHatchで魅せた熱狂のステージ |url=https://spice.eplus.jp/articles/303289 |url-status=live |archive-url=https://web.archive.org/web/20240414184123/https://spice.eplus.jp/articles/303289 |archive-date=2024-04-14 |access-date=2024-04-14 |website=Spice |publisher=Eplus |language=ja}}{{Cite web |last=Ato |first=Daishi |date=2022-09-04 |title=@onefive、初めての有観客ライブ映像作品のリリースを前にメンバーと振り返る |url=https://spice.eplus.jp/articles/307650?p=2 |url-status=live |archive-url=https://web.archive.org/web/20240414185431/https://spice.eplus.jp/articles/307650?p=2 |archive-date=2024-04-14 |access-date=2024-04-14 |website=Spice |publisher=Eplus |language=ja}} Other festivals included Sakae Sp-ring 2022 on June 5,{{Cite web |title=Artist – Sakae Sp-Rring 2022 |url=https://sakaespring.com/2022/artist |url-status=live |archive-url=https://web.archive.org/web/20231226020214/https://sakaespring.com/2022/artist/ |archive-date=2023-12-26 |access-date=2024-02-21 |website=Sakaesrping |language=ja}} Yatsui Festival 2022 on June 19,{{Cite web |date= April 10, 2022|title=Yatsui Festival! 2022 |url=https://shibuya-o.com/west/schedule/yatsui-festival-2022-2/ |url-status=live |archive-url=https://web.archive.org/web/20240221010616/https://shibuya-o.com/west/schedule/yatsui-festival-2022-2/ |archive-date=2024-02-21 |access-date=2024-02-21 |website=Shibuya O |language=ja}} and Spark 2022 in Yamanakako on July 18.{{Cite web |title=News {{!}} Spark 2022 in Yamanakako |url=https://www.sparkfes.com/news/20220607_1.html |url-status=live |archive-url=https://web.archive.org/web/20240221010649/https://www.sparkfes.com/news/20220607_1.html |archive-date=2024-02-21 |access-date=2024-02-21 |website=Sparkfes |language=ja}}

@onefive made its major label debut with Avex Trax on November 6, 2022, when the digital single "Miraizu" (未来図) was released. The song was featured as the theme song for the live-action television drama adaptation of the manga If My Favorite Pop Idol Made It to the Budokan, I Would Die.{{Cite web |date=2022-10-06 |title=＠ onefive、ドラマ『推しが武道館いってくれたら死ぬ』主題歌でエイベックスからメジャーデビュー決定 |url=https://spice.eplus.jp/articles/309021 |url-status=live |archive-url=https://web.archive.org/web/20240104200924/https://spice.eplus.jp/articles/309021 |archive-date=2024-01-04 |access-date=2023-12-29 |website=Spice |publisher=Eplus |language=ja}} The four members of @onefive were cast in the drama as members of the fictional idol group ChamJam. Namely, Fujihira as Maki Hakata, Yoshida as Yumeri Mizumori, Aritomo as Yūka Teramoto, and Mori as Sorane Matsuyama. The drama was broadcast for ten episodes on ABC TV and TV Asahi from October to December 2022.{{Cite web |last=Komatsu |first=Mikikazu |date=2022-08-15 |title=Meet ChamJam Members in If My Favorite Pop Idol Made It to the Budokan, I Would Die TV Drama |url=https://www.crunchyroll.com/news/latest/2022/8/15/meet-chamjam-members-in-if-my-favorite-pop-idol-made-it-to-the-budokan-i-would-die-tv-drama |url-status=live |archive-url=https://web.archive.org/web/20231229041210/https://www.crunchyroll.com/news/latest/2022/8/15/meet-chamjam-members-in-if-my-favorite-pop-idol-made-it-to-the-budokan-i-would-die-tv-drama |archive-date=December 29, 2023 |access-date=2024-01-19 |website=Crunchyroll |language=en }}{{Cite web |last=Komatsu |first=Mikikazu |date=2023-03-08 |title=If My Favorite Pop Idol Made It to the Budokan, I Would Die Live-Action Film Drops Full Trailer with Theme Song |url=https://www.crunchyroll.com/news/latest/2023/3/8/if-my-favorite-pop-idol-made-it-to-the-budokan-i-would-die-live-action-film-drops-full-trailer-with-theme-song |url-status=live |archive-url=https://web.archive.org/web/20240115005157/https://www.crunchyroll.com/news/latest/2023/3/8/if-my-favorite-pop-idol-made-it-to-the-budokan-i-would-die-live-action-film-drops-full-trailer-with-theme-song |archive-date=January 15, 2024 |access-date=2024-01-15 |website=Crunchyroll |language=en }} "Miraizu" was performed in a live setting for the first time on the first day of the @onefive Live 2022: Spotlight concerts, which were held in Osaka at the Umeda Club Quattro on November 6, 2022, and in Tokyo at The Garden Hall on November 13, 2022.{{Cite web |date=2022-11-13 |title=「@onefive LIVE 2022 -SPOTLIGHT-」恵比寿公演の配信が決定！ |url=http://onefive-web.jp/news/detail.php?id=1104055 |url-status=live |archive-url=https://web.archive.org/web/20240123184256/https://onefive-web.jp/news/detail.php?id=1104055 |archive-date=2024-01-23 |access-date=2024-01-23 |website=@onefive Official Site |language=ja}}{{Cite web |date=2022-09-26 |title=＠onefive、11月に東京と大阪でワンマンライブ開催決定 |url=https://natalie.mu/music/news/495110 |url-status=live |archive-url=https://web.archive.org/web/20240222012642/https://natalie.mu/music/news/495110 |archive-date=2024-02-22 |access-date=2024-02-22 |website=Natalie |publisher=Natasha, Inc. |language=ja}}

The official fan community service of @onefive was established on January 15, 2023, in the form of a subscription-based mobile application called @onefive Premium. In addition to digital membership cards, it would grant access to exclusive events, diaries, videos, ticket pre-sales, and other premium content.{{Cite web |date=2022-12-24 |title=『@onefiveプレミアム』 2023年1月15日 オープン決定!!!!期間限定メルマガ登録募集！ |url=http://onefive-web.jp/news/detail.php?id=1105106 |url-status=live |archive-url=https://web.archive.org/web/20240128171604/https://onefive-web.jp/news/detail.php?id=1105106 |archive-date=2024-01-28 |access-date=2024-01-28 |website=@onefive Official Site |language=ja}} The community was renamed to @fifth later that year and serves as the official fan club of @onefive.

The concert @onefive Live 2023: Chance×Change, which was held in Tokyo at the Ex Theater Roppongi on April 9, 2023, marked the first time that the audience could sing and cheer out loud, being no longer restricted by the COVID-19 pandemic. It also coincided with the transition of the members of @onefive from high school to university, a "change" that they each elaborated on during the conversational parts of the concert.{{Cite web |date=2023-04-19 |title=【@onefive：ライブレポート】4/9単独ライブ「@onefive LIVE 2023 -Chance×Change-」。初の声出し解禁ライブで実現した観客と双方向愛。変化を楽しむ4人の成長に期待しか感じさせない圧巻パフォーマンス！ |url=https://kukkatokyo.com/articles/6910/ |url-status=live |archive-url=https://web.archive.org/web/20240123180818/https://kukkatokyo.com/articles/6910/ |archive-date=2024-01-23 |access-date=2024-01-23 |website=Kukka Tokyo |language=ja}}

On May 12, 2023, the live-action film adaptation of the manga If My Favorite Pop Idol Made It to the Budokan, I Would Die was released with "Chance" as its theme song. The four members of @onefive reprised their roles from the television drama. Their vocals as ChamJam from the film and television drama adaptations were included on the second disc of the two-disc album I Live For You (きみのために生きてる, Kimi no Tame ni Ikiteru), released by Pony Canyon on May 10, 2023.{{Cite web |last=Komatsu |first=Mikikazu |date=2023-05-01 |title=If My Favorite Pop Idol Made It to the Budokan, I Would Die Anime Posts Reo's Graduation Song |url=https://www.crunchyroll.com/news/latest/2023/5/1/if-my-favorite-pop-idol-made-it-to-the-budokan-i-would-die-anime-posts-reos-graduation-song |url-status=live |archive-url=https://web.archive.org/web/20240130024645/https://www.crunchyroll.com/news/latest/2023/5/1/if-my-favorite-pop-idol-made-it-to-the-budokan-i-would-die-anime-posts-reos-graduation-song |archive-date=January 30, 2024 |access-date=2024-01-30 |website=Crunchyroll }}{{Cite web |title=「推しが武道館いってくれたら死ぬ」コンプリートボーカルアルバム「きみのために生きてる」 |url=https://www.ponycanyon.co.jp/music/PCCG000002239 |url-status=live |archive-url=https://web.archive.org/web/20240130023852/https://www.ponycanyon.co.jp/music/PCCG000002239 |archive-date=2024-01-30 |access-date=2024-01-30 |website=Pony Canyon |language=ja}}

On August 4, 2023, @onefive performed as an opening act at the TGC Teen 2023 Summer fashion festival, which was held at the Yoyogi National Gymnasium.{{Cite web |date=2023-08-04 |title=TGC teen 2023 Summer OPENING ACT @onefive ステージレポート |url=https://cinema.u-cs.jp/event/tgcteen2023s_op-act_onefive/ |url-status=live |archive-url=https://web.archive.org/web/20240326043543/https://cinema.u-cs.jp/event/tgcteen2023s_op-act_onefive/ |archive-date=2024-03-26 |access-date=2024-03-26 |website=Cinema Art Online}}{{Cite web |date=2023-09-04 |title=@onefive新譜テーマは「JD」！凄まじい速度でアップデートし続けるZ世代4人組ガールズグループの最新版に迫る |url=https://spice.eplus.jp/articles/321802 |url-status=live |archive-url=https://web.archive.org/web/20240227052640/https://spice.eplus.jp/articles/321802 |archive-date=2024-02-27 |access-date=2024-02-27 |website=Spice |publisher=Eplus |language=ja}}

@onefive participated for the first time in the Tokyo Idol Festival on August 6, 2023, in Odaiba. The group had two performances, first at the "Sky Stage" on the rooftop of the Fuji Television Wangan Studio, and second at the "Heat Garage" at Zepp DiverCity. The members themselves had previously participated every year in the festival when they were part of Sakura Gakuin.{{Cite web |date=2023-08-07 |title=【TIF2023】@ onefive、ニューシングル表題曲『Justice Day』をTIF初披露 パフォーマンスのカッコよさで魅了 |url=https://girlsnews.tv/unit/420728 |url-status=live |archive-url=https://web.archive.org/web/20240114202657/https://girlsnews.tv/unit/420728 |archive-date=2024-01-14 |access-date=2024-01-14 |website=GirlsNews |language=ja}}{{Cite web |last=ポッター |first=平井 |date=2023-06-30 |title=【@onefiveインタビュー】『推し武道』に出演＆主題歌も担当！注目のガールズグループの素顔に迫る！キャンパスライフ秘話も！ |url=https://galpo.info/feature/702/list/7778 |url-status=live |archive-url=https://web.archive.org/web/20240114202639/https://galpo.info/feature/702/list/7778 |archive-date=2024-01-14 |access-date=2024-01-14 |website=Galpo |language=ja}}

On August 20, 2023, @onefive performed three songs as a special guest after the Ciao Girl 2023 Audition at the Ciao×Ribon Girls Comic Festival, which was held at Pacifico Yokohama.{{Cite web |date=2023-08-21 |title=「ちゃおガール2023」11歳・めいさがグランプリに 木村昴の前でジャイアンのものまね披露 |url=https://realsound.jp/movie/2023/08/post-1408542.html |url-status=live |archive-url=https://web.archive.org/web/20240228230713/https://realsound.jp/movie/2023/08/post-1408542.html |archive-date=February 28, 2024 |access-date=2024-02-28 |website=Real Sound |language=ja}}

On August 26, 2023, the song "Like A" from the CD single "Justice Day" was featured in a commercial for the Japanese jewelry brand The Kiss.{{Cite web |date=2023-08-21 |title=8/26（土） 2023年 新CM公開！ |url=https://www.thekiss.co.jp/news/detail/3002.html |url-status=live |archive-url=https://web.archive.org/web/20240101043125/https://www.thekiss.co.jp/news/detail/3002.html |archive-date=2024-01-01 |access-date=2024-01-01 |website=The Kiss Online Shop |publisher=The Kiss, Inc. |language=ja}}

In November 2023, @onefive was selected to be the Generation Z Leader for Amazon Fashion Japan. The members began modeling for Amazon with seasonal outfits incorporating coats, sweaters, and other winter essentials, while aiming to convey the charm of Generation Z through fashion.{{Cite web |date=2023-11-20 |title=@onefive、Amazon FashionのZ世代リーダーに就任 冬ファッションを着こなす |url=https://realsound.jp/2023/11/post-1494442.html |url-status=live |archive-url=https://web.archive.org/web/20240112023101/https://realsound.jp/2023/11/post-1494442.html |archive-date=2024-01-12 |access-date=2024-01-12 |website=Real Sound |language=ja}}

November 17, 2023, marked the creation of the group's official characters, or mascots, called @chib15, pronounced chibi five. Each of the four members designed their own character: Laa the lion by Fujihira, Babu the chick by Yoshida, Zoey the fawn by Aritomo, and Mimi the rabbit by Mori.{{Cite web |date=2023-11-17 |title=@onefiveオフィシャルキャラクター「@CHIB15（読み：ちびふぁいぶ）」誕生 |url=https://amuseplus.jp/mob/pageShw.php?site=A&cd=active-info-detail&info_id=29562&arti=A8942 |url-status=live |archive-url=https://web.archive.org/web/20240104203251/https://amuseplus.jp/mob/pageShw.php?site=A&cd=active-info-detail&info_id=29562&arti=A8942 |archive-date=2024-01-04 |access-date=2024-01-01 |website=Amuse Plus |language=ja}}

It was announced on December 1, 2023, that @onefive would be a participating artist in the NTV Imaginarium 2023 metaverse festival, which was organized by Nippon TV in commemoration of the broadcasting corporation's 70th anniversary. The festival had a virtual reality component utilizing the Japanese metaverse platform Cluster, as well as a real life component in the form of an art exhibition at the Museum of Contemporary Art Tokyo. The members of @onefive created pieces of pixel art depicting their @chib15 characters for the festival, which were both physically displayed at the exhibition and virtually granted as NFTs to those who purchased tickets to the metaverse venue in Cluster. A series of virtual events had been planned to take place at the metaverse venue from December 9, 2023, to March 3, 2024, involving the various participating artists. @onefive's event was a metaverse party where attendees would dress their avatars in neo-retro style clothing, as seen in the music video for "F.A.F.O", and dance to the group's music.{{Cite web |date=2023-12-01 |title=日テレイマジナリウム |url=https://www.ntv.co.jp/imaginarium/topics/f8cp4iypxkzgzryi.html |url-status=live |archive-url=https://web.archive.org/web/20240104203450/https://www.ntv.co.jp/imaginarium/topics/f8cp4iypxkzgzryi.html |archive-date=2024-01-04 |access-date=2024-01-02 |website=日本テレビ |publisher=Nippon Television Network Corporation |language=ja}}{{Cite web |date=2023-12-29 |title=ドレスコードは「ネオレトロ」！@onefiveとメタバースパーティーを開催します |url=https://www.ntv.co.jp/imaginarium/topics/xe8flhsyy25p2bf1.html |url-status=live |archive-url=https://web.archive.org/web/20240104203544/https://www.ntv.co.jp/imaginarium/topics/xe8flhsyy25p2bf1.html |archive-date=2024-01-04 |access-date=2024-01-02 |website=日本テレビ |publisher=Nippon Television Network Corporation |language=ja}}{{Cite web |date=2023-12-01 |title=日本テレビが開局70年を記念し開催 次世代アート＆エンタメ集結のメタバースフェス「日テレイマジナリウム」参加アーティスト決定！ |url=https://prtimes.jp/main/html/rd/p/000000011.000046816.html |url-status=live |archive-url=https://web.archive.org/web/20240104203711/https://prtimes.jp/main/html/rd/p/000000011.000046816.html |archive-date=2024-01-04 |access-date=2024-01-02 |website=PR Times |language=ja}}

In the final quarter of 2023, the group held two concerts under the title @onefive Live 2023: No15e Maker. The first concert, subtitled Underground, was held in Osaka at the Yogibo Meta Valley on November 25, 2023. The second concert, subtitled Overground, took place in Tokyo at the Ex Theater Roppongi on December 21, 2023. The two subtitles referred to the process of rising from the underground.{{Cite web |date=2023-09-10 |title=@onefive 今年二度目のワンマンライブ「NO15E MAKER」が開催決定！【チケット受付中】 |url=https://avexnet.jp/contents/music_j/ONEFV-OFCL-0001/news/1111076 |url-status=live |archive-url=https://web.archive.org/web/20240120125131/https://avexnet.jp/contents/music_j/ONEFV-OFCL-0001/news/1111076 |archive-date=2024-01-20 |access-date=2024-01-20 |website=Avex Portal |language=ja}} At the conclusion of the second concert, it was announced that @onefive's second studio album would be released in the spring of 2024.

The song "Mr.Gorgeous" was featured in a commercial for Amazon Prime Video on April 8, 2024.{{Cite web |date=2024-04-10 |title=@ onefive、ニューアルバム「Classy Crush」から「Mr.Gorgeous」が大泉洋出演のAmazonプライム・ビデオの新CMソングに起用 |url=https://www.musicman.co.jp/artist/608883 |url-status=live |archive-url=https://web.archive.org/web/20240410020825/https://www.musicman.co.jp/artist/608883 |archive-date=2024-04-10 |access-date=2024-04-10 |website=Musicman |publisher=F.B. Communications Inc. and Magnet Co., Ltd. |language=ja}}

On April 17, 2024, @onefive's second studio album and first major label album, titled Classy Crush, was released.{{Cite web |date=2024-04-18 |title=@ onefive、メジャー1stアルバム『Classy Crush』リード曲「OZGi」のMV公開 |url=https://www.cdjournal.com/main/news/onefive/110091 |url-status=live |archive-url=https://web.archive.org/web/20240502022346/https://www.cdjournal.com/main/news/onefive/110091 |archive-date=2024-05-02 |access-date=2024-05-02 |website=CD Journal |language=ja}} The album contains songs that depict strong Japanese girls, including its lead song "OZGi", pronounced ojigi, which was produced with the theme of "Japanese Classy Crush".{{Cite web |date=2024-02-19 |title=@ onefive、メジャー1stアルバム発売決定 |url=https://www.barks.jp/news/?id=1000244846 |url-status=live |archive-url=https://web.archive.org/web/20240219150448/https://www.barks.jp/news/?id=1000244846 |archive-date=2024-02-19 |access-date=2024-02-19 |website=Barks |language=ja}} "Classy" refers to old things, stereotypical images and ways of thinking, and conventional ways of doing things. "Crush" expresses @onefive's desire to destroy things of that nature, which hold them back, and to move forward in a new way instead. "Japanese" emphasizes the cultural origins of the members of @onefive, and indicates that while doing away with the negative parts, the group wishes to preserve and promote the parts of old, traditional Japan that are good and beautiful, such as bowing, calligraphy, and ikebana.{{Cite web |last=高崎 |first=計三 |date=2024-04-15 |title=【@ onefive】1st Album『Classy Crush』 今までのステレオタイプを壊していきたい |url=http://avexnet.jp/column/detail.php?id=1000733 |url-status=live |archive-url=https://web.archive.org/web/20240415034657/https://avexnet.jp/column/detail.php?id=1000733 |archive-date=2024-04-15 |access-date=2024-04-15 |website=Avex Portal |language=ja}}{{Cite web |last=Lee |first=Hannah |date=2024-05-01 |title=Interview with @onefive |url=https://nantejapan.com/interview-with-onefive/ |url-status=live |archive-url=https://web.archive.org/web/20240501013433/https://nantejapan.com/interview-with-onefive/ |archive-date=2024-05-01 |access-date=2024-05-01 |website=Nante Japan |language=en-US}} Classy Crush charted at number 16 on the weekly Oricon Albums Chart.{{Cite web |title=2024年04月15日～2024年04月21日 オリコン週間 アルバムランキング 11～20位 |url=https://www.oricon.co.jp/rank/ja/w/2024-04-29/p/2/ |url-status=live |archive-url=https://web.archive.org/web/20240424232625/https://www.oricon.co.jp/rank/ja/w/2024-04-29/p/2/ |archive-date=2024-04-24 |access-date=2024-04-24 |website=Oricon News}}

The song "Love Call" was featured in a commercial for the Japanese jewelry brand The Kiss on August 8, 2024, in which the four members also appeared.{{Cite web |date=2024-08-08 |title=8月8日は"ペアリングの日" @onefiveが『THE KISS』の新CMに出演&楽曲タイアップ決定 |url=https://www.oricon.co.jp/news/2339580/full/ |url-status=live |archive-url=https://web.archive.org/web/20240808002009/https://www.oricon.co.jp/news/2339580/full/ |archive-date=2024-08-08 |access-date=2024-08-08 |website=Oricon News}}

On September 1, 2024, @onefive performed as a "shooting act" at A-Nation 2024 at the Ajinomoto Stadium.{{Cite web |date=2024-08-10 |title=@ onefive、夏フェス〈a-nation 2024〉出演決定 新曲「KAGUYA」リリース |url=https://www.cdjournal.com/main/news/onefive/112437 |url-status=live |archive-url=https://web.archive.org/web/20240814214906/https://www.cdjournal.com/main/news/onefive/112437 |archive-date=2024-08-14 |access-date=2024-08-15 |website=CD Journal |language=ja}}{{Cite web |date=2024-09-01 |title=NCT WISH、MAZZEL、NiziUら「a-nation」に初出演 「きょうはいっぱい盛り上がっていきましょう」 |url=https://www.chunichi.co.jp/article/952130 |url-status=live |archive-url=https://web.archive.org/web/20240901144816/https://www.chunichi.co.jp/article/952130 |archive-date=2024-09-01 |access-date=2024-09-01 |website=Chunichi Shimbun |language=ja}}

@onefive's first national tour, titled @onefive Livehouse Tour 2024 "Classy Crush", took place between August 17 and September 15, 2024.{{Cite web |last=ポッター |first=平井 |date=2024-04-17 |title=【インタビュー】メジャー1stアルバムをリリース！今夏に初めての全国ツアーを控えた注目のガールズグループ、@onefive（ワンファイブ）のメンバーは「自転車に乗れない」、「プロの帰宅部」!? |url=https://entameclip.com/news/396435/ |url-status=live |archive-url=https://web.archive.org/web/20240416155736/https://entameclip.com/news/396435/ |archive-date=2024-04-16 |access-date=2024-04-16 |website=Entame Clip |language=ja}}

The group celebrated its 5th anniversary with a concert titled 5555, held on October 19, 2024, at the Shibuya WWW X venue.{{Cite web |date=2024-10-19 |title=@ onefive、デビュー5周年記念ワンマン・ライヴを開催 「@ onefiveに人生を捧げたい」 |url=https://www.cdjournal.com/main/news/onefive/113929 |url-status=live |archive-url=https://web.archive.org/web/20241228015400/https://www.cdjournal.com/main/news/onefive/113929 |archive-date=December 28, 2024 |access-date=2024-10-19 |website=CD Journal |language=ja}}

A variety series centered around the members, titled 15Vibes, premiered on TV Asahi's Logirl on November 7, 2024.{{Cite web |date=2024-11-05 |title=テレ朝動画logirl「15VIBES」配信決定 |url=https://amuseplus.jp/mob/pageShw.php?site=A&cd=active-info-detail&info_id=33433&arti=A8942 |url-status=live |archive-url=https://web.archive.org/web/20241224052416/https://amuseplus.jp/mob/pageShw.php?site=A&cd=active-info-detail&info_id=33433&arti=A8942 |archive-date=2024-12-24 |access-date=2024-12-24 |website=Amuse Plus |language=ja}}

@onefive's first international performance took place in Tainan City, Taiwan, at the 2025 Tainan Hao Young New Year's Eve Party on December 31, 2024.{{Cite news |last= |date=2024-12-30 |title=海外首演！日本新生代女團@onefive嗨唱台南跨年 大讚牛肉麵「好好吃」 |url=https://ent.ltn.com.tw/news/breakingnews/4908526 |url-status=live |archive-url=https://web.archive.org/web/20241231033324/https://ent.ltn.com.tw/news/breakingnews/4908526 |archive-date=December 31, 2024 |access-date=2024-12-31 |work=Liberty Times Net |language=zh-TW }}

In February and March 2025, the members of @onefive partnered with various stores as one-day store managers to promote their upcoming spring tour, titled @onefive Tour 2025 "More Than Kawaii".{{Cite web |last= |first= |date=2025-03-01 |title=@onefive ミュージックカード『ｍore than kawaii』リリース記念イベントで、彼女達の魅力に迫る。【イベントレポート】 |url=https://bhodhit.jp/onefive_lalaport_toyosu/ |url-status=live |archive-url=https://megalodon.jp/2025-0302-0254-05/https://bhodhit.jp:443/onefive_lalaport_toyosu/ |archive-date=2025-03-01 |access-date=2025-03-01 |website=Bhodhit Magazine |language=ja}}{{Cite web |date=2025-03-07 |title="more than kawaii" 1日店長キャンペーン スペシャル感謝祭 開催決定！ |url=https://avexnet.jp/contents/ONEFV-OFCL-0001/news/1123398 |url-status=live |archive-url=https://web.archive.org/web/20250307154658/https://avexnet.jp/contents/ONEFV-OFCL-0001/news/1123398 |archive-date=2025-03-07 |access-date=2025-03-09 |website=Avex Portal}}

The digital EP More Than Kawaii was released on March 26, 2025.{{Cite web |date=2025-03-09 |title=@onefive、新EP『more than kawaii』全貌公開 |url=https://ototoy.jp/news/122614 |url-status=live |archive-url=https://web.archive.org/web/20250309125244/https://ototoy.jp/news/122614 |archive-date=2025-03-09 |access-date=2025-03-09 |website=Ototoy |language=ja}} It was produced on the concept that, in this world where kawaii is commonplace, @onefive will not be limited to being only kawaii.{{Cite web |last= |first= |date=2025-01-01 |title=@onefiveが3カ月連続で新作リリース、2025年のテーマは「more than kawaii」 |url=https://natalie.mu/music/news/606232 |url-status=live |archive-url=https://web.archive.org/web/20250101051012/https://natalie.mu/music/news/606232 |archive-date=2025-01-01 |access-date=2025-03-02 |website=Natalie |publisher=Natasha, Inc. |language=ja}} The members were deeply involved in the production of the songs from scratch, putting their own real thoughts and feelings into them. Fujihira also participated as an assistant in the process of choreographing "Sit Down Please".{{Cite web |date=2025-03-30 |title=@ onefive、最新EPより「Sit Down Please」ダンスパフォーマンス映像公開 |url=https://www.barks.jp/news/?id=1000254965 |url-status=live |archive-url=https://web.archive.org/web/20250331015445/https://www.barks.jp/news/?id=1000254965 |archive-date=2025-03-31 |access-date=2025-03-31 |website=Barks |language=ja}}

The More Than Kawaii tour began on March 30, 2025.

@onefive aims to showcase the appeal of Japanese music while also incorporating elements of foreign music.{{Cite web |last= |date=2024-04-11 |title=【@ onefiveインタビュー】"日本の"強い女の子の姿を多彩な楽曲で表現したメジャー1stアルバム そこには4人の強い覚悟が…「本気で一緒にもっと上に行きたいと思わせられるようなパフォーマンスをしていきたい」 |url=https://girlsnews.tv/unit/438815 |url-status=live |archive-url=https://web.archive.org/web/20240411154451/https://girlsnews.tv/unit/438815 |archive-date=2024-04-11 |access-date=2024-04-11 |website=GirlsNews |language=ja}} Those elements have included hip-hop,{{Cite web |date=2024-02-14 |title=@onefive、最新曲「ショコラブ」MVをバレンタイン当日に公開 |url=https://ototoy.jp/news/116662 |url-status=live |archive-url=https://web.archive.org/web/20240214202521/https://ototoy.jp/news/116662 |archive-date=2024-02-14 |access-date=2024-02-14 |website=Ototoy |language=ja}} jungle, Jersey club, and Middle Eastern music. @onefive's lyrics often depict strong girls{{Cite web |last= |date=2024-04-01 |title=@ onefive、"OZGi=お辞儀"に込めるのはありがたみ 最新アー写真公開 & 最新曲『OZGi』のTikTok先行配信がスタート |url=https://girlsnews.tv/unit/438022 |url-status=live |archive-url=https://web.archive.org/web/20240401005427/https://girlsnews.tv/unit/438022 |archive-date=2024-04-01 |access-date=2024-04-01 |website=GirlsNews |language=ja}} and incorporate the thoughts and feelings of its members.{{Cite web |date=2023-09-07 |title=【＠onefive インタビュー】歌詞はどの部分も今の私たちの気持ちと重なる |url=https://okmusic.jp/news/532306 |url-status=dead |archive-url=https://web.archive.org/web/20240417204820/https://okmusic.jp/news/532306 |archive-date=2024-04-17 |access-date=2024-04-17 |website=OKMusic}} The members are deeply involved in various aspects of the group's creative processes.{{Cite web |date=2022-02-01 |title=【@onefive：インタビュー】ファン待望の1stアルバム「1518」が2/2（水）にリリース！成長止まない彼女たち４人の軌跡がこの一枚に集約！ |url=https://kukkatokyo.com/articles/4096/ |url-status=live |archive-url=https://web.archive.org/web/20240602145812/https://kukkatokyo.com/articles/4096 |archive-date=2024-06-02 |access-date=2024-06-02 |website=Kukka Tokyo |language=ja}}{{Cite web |last=Shinkai |first=Satoshi |date=2025-02-14 |title=@onefiveが問いかける"かわいい"の真の意味 無敵の強さに繋がる5年の道のり、4つの「あの日」を振り返る |url=https://realsound.jp/2025/02/post-1926322.html |url-status=live |archive-url=https://web.archive.org/web/20250214123944/https://realsound.jp/2025/02/post-1926322.html |archive-date=2025-02-14 |access-date=2025-02-14 |website=Real Sound |language=ja}} They have mentioned Blackpink, Perfume, Red Velvet, and Mamamoo as influences.{{Cite web |date=2021-03-03 |title=全員16歳の@onefive「ビビビッ！」とくる魔法のニューシングルを発表 |url=https://ananweb.jp/column/ongakutusin/336116/ |url-status=dead |archive-url=https://web.archive.org/web/20240111222342/https://ananweb.jp/column/ongakutusin/336116/ |archive-date=2024-01-11 |access-date=2024-01-11 |website=Anan Web |publisher=Magazine House |language=ja}}

• Kano Fujihira as Kano (2019–present)
• Soyoka Yoshida as Soyo (2019–present)
• Tsugumi Aritomo as Gumi (2019–present)
• Momoe Mori as Momo (2019–present)

• 1518 (February 2, 2022)
• Classy Crush (April 17, 2024)

• More Than Kawaii (March 26, 2025)

• "Mada Minu Sekai" (まだ見ぬ世界) (June 24, 2020){{Cite web |date=2020-05-27 |title=＠onefiveが1stシングル「まだ見ぬ世界」でCDデビュー決定 |url=https://natalie.mu/music/news/380602 |url-status=live |archive-url=https://web.archive.org/web/20240507161226/https://natalie.mu/music/news/380602 |archive-date=2024-05-07 |access-date=2024-05-07 |website=Natalie |publisher=Natasha, Inc. |language=ja}}
• "BBB" (March 3, 2021)
• "Chance×Change" (May 24, 2023){{Cite web |date=2023-03-22 |title=@onefiveがメジャー初シングル「Chance×Change」をリリース決定 |url=https://mdpr.jp/news/detail/3662224 |url-status=live |archive-url=https://web.archive.org/web/20240506201400/https://mdpr.jp/news/detail/3662224 |archive-date=2024-05-06 |access-date=2024-05-06 |website=Modelpress |language=ja}}
• "Justice Day" (August 23, 2023){{Cite web |date=2023-08-04 |title=@onefiveは"果敢に挑戦できる強い世代"、ニューシングルのジャケ＆ビジュアル公開 |url=https://natalie.mu/music/news/535600 |url-status=live |archive-url=https://web.archive.org/web/20240506201124/https://natalie.mu/music/news/535600 |archive-date=2024-05-06 |access-date=2024-05-06 |website=Natalie |language=ja}}

• "Pinky Promise" (October 20, 2019)
• "Shizuku" (雫) (October 20, 2020){{Cite web |date=2020-09-15 |title=@ onefive、配信シングル「雫」を10月にリリース決定 メンバーコメント＆最新アーティスト写真も公開に |url=https://spice.eplus.jp/articles/275626 |url-status=live |archive-url=https://web.archive.org/web/20240104204959/https://spice.eplus.jp/articles/275626 |archive-date=2024-01-04 |access-date=2023-12-29 |website=Spice |publisher=Eplus |language=ja}}
• "Underground" (November 24, 2021){{Cite web |date=2021-10-16 |title=@onefiveが配信シングル「Underground」リリース、ドキュメンタリーシリーズの公開も決定 |url=https://lp.p.pia.jp/article/news/204206/index.html |url-status=live |archive-url=https://web.archive.org/web/20240104205216/https://lp.p.pia.jp/article/news/204206/index.html |archive-date=2024-01-04 |access-date=2023-12-29 |website=Pia |language=ja}}
• "Just for You" (December 1, 2021){{Cite web |date=2021-12-23 |title=12月23日（木）GUEST：@onefive - FM大阪 85.1 |url=https://www.fmosaka.net/_ct/17506235 |url-status=live |archive-url=https://archive.today/20240104205906/https://www.fmosaka.net/_ct/17506235 |archive-date=2024-01-04 |access-date=2023-12-29 |website=FM Osaka |language=ja}}
• "Miraizu" (未来図) (November 6, 2022){{Cite web |date=2022-10-21 |title=@onefive、メジャーデビュー曲「未来図」配信リリース |url=https://natalie.mu/music/news/498417 |url-status=live |archive-url=https://web.archive.org/web/20240104201842/https://natalie.mu/music/news/498417 |archive-date=2024-01-04 |access-date=2023-12-29 |website=Natalie |publisher=Natasha, Inc. |language=ja}}
• "Chance" (April 1, 2023){{Cite web |date=2023-03-09 |title=@ onefive、新曲「Chance」が『劇場版 推し武道』主題歌に |url=https://www.barks.jp/news/?id=1000230948 |url-status=live |archive-url=https://web.archive.org/web/20240506211739/https://www.barks.jp/news/?id=1000230948 |archive-date=2024-05-06 |access-date=2024-05-06 |website=Barks |language=ja}}
• "F.A.F.O" (November 22, 2023){{Cite web |date=2023-11-03 |title=＠onefive、新曲「F.A.F.O」の配信リリースが決定 |url=https://okmusic.jp/news/538192 |url-status=dead |archive-url=https://web.archive.org/web/20240104205919/https://okmusic.jp/news/538192 |archive-date=2024-01-04 |access-date=2023-12-29 |website=OKMusic |language=ja}}
• "ChocoLove" (ショコラブ) (January 17, 2024){{Cite web |date=2024-01-18 |title=@ onefive、バレンタインをダークでクールな面から表現した新曲「ショコラブ」を配信リリース |url=https://www.cdjournal.com/main/news/onefive/108251 |url-status=live |archive-url=https://web.archive.org/web/20240219144229/https://www.cdjournal.com/main/news/onefive/108251 |archive-date=2024-02-19 |access-date=2024-02-19 |website=CD Journal |language=ja}}
• "Kaguya" (August 14, 2024){{Cite web |date=August 15, 2024 |title=@ onefive、最新曲「KAGUYA」MVをプレミア公開 |url=https://www.cdjournal.com/main/news/onefive/112500 |url-status=live |archive-url=https://web.archive.org/web/20241209224336/https://www.cdjournal.com/main/news/onefive/112500 |archive-date=December 9, 2024 |access-date=December 9, 2024 |website=CD Journal |language=ja}}
• "Love Call" (October 16, 2024){{Cite web |date=2024-10-03 |title=a-nationのシューティングアクトを務めた@onefive、最新曲「Love Call」を10/16配信リリース |url=https://www.musicman.co.jp/artist/637244 |url-status=live |archive-url=https://web.archive.org/web/20241003134704/https://www.musicman.co.jp/artist/637244 |archive-date=2024-10-03 |access-date=2024-10-03 |website=Musicman |publisher=F.B. Communications Inc. and Magnet Co., Ltd. |language=ja}}
• "Liar Liar" (らいあーらいあー) (January 15, 2025){{Cite web |date=2025-01-16 |title=@ onefive、台湾の年越しカウントダウンフェスで披露した最新曲「らいあーらいあー」を配信リリース |url=https://www.cdjournal.com/main/news/onefive/115780 |url-status=live |archive-url=https://web.archive.org/web/20250116054535/https://www.cdjournal.com/main/news/onefive/115780 |archive-date=2025-01-16 |access-date=2025-03-09 |website=CD Journal |language=ja}}
• "Kawaii Kaiwai" (February 14, 2025){{Cite web |last= |first= |date=2025-02-09 |title=@onefiveがバレンタインに新曲「KAWAII KAIWAI」リリース |url=https://natalie.mu/music/news/611015 |url-status=live |archive-url=https://web.archive.org/web/20250209092706/https://natalie.mu/music/news/611015 |archive-date=2025-02-09 |access-date=2025-02-09 |website=Natalie |publisher=Natasha, Inc. |language=ja}}

{{reflist}}

• [https://onefive-web.jp @onefive official website]
• [https://www.amuse.co.jp/artist/A8942/ Official Amuse profile]
• [https://avexnet.jp/contents/music_j/ONEFV-OFCL-0001/ Official Avex profile]

{{Sakura Gakuin}}

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Category:Japanese girl groups

Category:J-pop music groups

Category:Japanese pop music groups

Category:Japanese hip-hop groups

Category:Japanese idol groups

Category:Amuse Inc. artists

Category:Avex Trax artists

Category:Avex Group artists

Category:Musical groups established in 2019

Category:2019 establishments in Japan