List of Oricon number-one singles of 1987
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The highest-selling singles in Japan are ranked in the Oricon Singles Chart, which is published by Oricon Style magazine. The data are compiled by Oricon based on each singles' physical sales. This list includes the singles that reached the number one place on that chart in 1987.
Oricon Weekly Singles Chart
| class="wikitable plainrowheaders" style="text-align: center"
!width="80"|Issue date !width="100"|Song !width="100"|Artist(s) !width="20"|Ref. |
| scope="row"|January 5
|rowspan="1"|"{{ill|Yakusoku (Mamiko Takai song)|ja|約束_(高井麻巳子の曲)|lt=Yakusoku}}" |rowspan="1"|Mamiko Takai |
|---|
| scope="row"|January 12
|rowspan="1"|"{{ill|White Rabbit Kara no Message|ja|ホワイトラビットからのメッセージ}}" |rowspan="1"|Marina Watanabe |
| scope="row"|January 19
|rowspan="1"|"{{ill|Rakuen no Door|ja|楽園のDoor}}" |rowspan="1"|Yoko Minamino |
| scope="row"|January 26
|rowspan="1"|"{{ill|Too Adult|ja|TOO ADULT}}" |rowspan="1"|Minayo Watanabe |
| scope="row"|February 2
|rowspan="1"|"No More Renai Gokko" |rowspan="1"|Onyanko Club |
| scope="row"|February 9
|rowspan="1"|"{{ill|Yuki Gani|ja|雪國 (曲)}}" |rowspan="1"|Yoshi Ikuzō |
| scope="row"|February 16
|rowspan="2"|"Tango Noir" |rowspan="2"|Akina Nakamori |
| scope="row"|February 23 |
| scope="row"|March 2
|rowspan="1"|{{ill|Kashiko|ja|かしこ (曲)}} |rowspan="1"|Ushiroyubi Sasaregumi |
| scope="row"|March 9
|rowspan="1"|"{{ill|Mizu no Rogue|ja|水のルージュ}}" |rowspan="1"|Kyoko Koizumi |
| scope="row"|March 16
|rowspan="1"|"{{ill|Stripe Blue|ja|stripe blue}}" |rowspan="1"|Shonentai |
| scope="row"|March 23
|rowspan="1"|"{{ill|Sapphire no Hitomi|ja|サファイアの瞳}}" |rowspan="1"|The Alfee |
| scope="row"|March 30
|rowspan="1"|"{{ill|Kagerō (Mamiko Takai song)|ja|かげろう (高井麻巳子の曲)|lt=Kagerō}}" |rowspan="1"|Mamiko Takai |
| scope="row"|April 6
|rowspan="1"|"{{ill|Idol wo Sagase|ja|アイドルを探せ (菊池桃子の曲)}}" |rowspan="1"|Momoko Kikuchi |
| scope="row"|April 13
|rowspan="1"|"{{ill|Hanashikake Takatta|ja|話しかけたかった}}" |rowspan="1"|Yoko Minamino |
| scope="row"|April 20
|rowspan="1"|"{{ill|Marina no Natsu|ja|マリーナの夏}}" |rowspan="1"|Marina Watanabe |
| scope="row"|April 27
|rowspan="1"|"{{ill|Pink no Chao|ja|PINKのCHAO}}" |rowspan="1"|Minayo Watanabe |
| scope="row"|May 4
|rowspan="2"|"{{ill|Strawberry Time|ja|Strawberry Time}}" |rowspan="2"|Seiko Matsuda |
| scope="row"|May 11 |
| scope="row"|May 18
|rowspan="1"|"{{ill|Toki no Kawa wo Koete|ja|時の河を越えて}}" |rowspan="1"|Ushirogami Hikaretai |
| scope="row"|May 25
|rowspan="1"|"Strawberry Time" |rowspan="1"|Seiko Matsuda |
| scope="row"|June 1
|rowspan="1"|"Katatsumuri Samba" |rowspan="1"|Onyanko Club |
| scope="row"|June 8
|rowspan="1"|"{{ill|Mizu no Naka no Answer|ja|水の中のAnswer}}" |rowspan="1"|Kiyotaka Sugiyama |
| scope="row"|June 15
|rowspan="2"|"Blonde" |rowspan="2"|Akina Nakamori |
| scope="row"|June 22 |
| scope="row"|June 29
|rowspan="1"|"Sayonara no Kajitsutachi" |rowspan="1"|Yōko Oginome |
| scope="row"|July 6
|rowspan="1"|"{{ill|Kimi Dake ni|ja|君だけに}}" |rowspan="1"|Shonentai |
| scope="row"|July 13
|rowspan="1"|"{{ill|Pandora no Koibito|ja|パンドラの恋人}}" |rowspan="1"|Yoko Minamino |
| scope="row"|July 20
|rowspan="1"|"{{ill|Wanderer (Checkers song)|ja|WANDERER (チェッカーズの曲)|lt=Wanderer}}" |rowspan="1"|Checkers |
| scope="row"|July 27
|rowspan="1"|"{{ill|Natsuyasumi Dake no Sidesheet|ja|夏休みだけのサイドシート}}" |rowspan="1"|Marina Watanabe |
| scope="row"|August 3
|rowspan="1"|"{{ill|Marionette (Boøwy song)|ja|Marionette (BOOWYの曲)|lt=Marionette}}" |rowspan="1"|Boøwy |
| scope="row"|August 10
|rowspan="1"|"{{ill|Amaryllis (Minayo Watanabe song)|ja|アマリリス (渡辺美奈代の曲)|lt=Amaryllis}}" |rowspan="1"|Minayo Watanabe |
| scope="row"|August 17
|rowspan="1"|"Marionette" |rowspan="1"|Boøwy |
| scope="row"|August 24
|rowspan="1"|"{{ill|Kita no Tabibito|ja|北の旅人}}" |rowspan="1"|Yujiro Ishihara |
| scope="row"|August 31
|rowspan="1"|"{{ill|Star Light (Hikaru Genji song)|ja|STAR LIGHT (光GENJIの曲)|lt=Star Light}}" |rowspan="1"|Hikaru Genji |
| scope="row"|September 7
|rowspan="1"|"{{ill|Shade (Kiyotaka Sugiyama song)|ja|SHADE〜夏の翳り〜|lt=Shade}}" |rowspan="1"|Kiyotaka Sugiyama |
| scope="row"|September 14
|rowspan="1"|"Kindan no Telepathy" |rowspan="1"|Shizuka Kudo |
| scope="row"|September 21
|rowspan="1"|"{{ill|Niji no Dreamer|ja|虹のDreamer}}" |rowspan="1"|Yui Asaka |
| scope="row"|September 28
|rowspan="1"|"{{ill|Naite Miryaii Jan|ja|泣いてみりゃいいじゃん}}" |rowspan="1"|Masahiko Kondō |
| scope="row"|October 5
|rowspan="1"|"{{ill|Aki no Indication|ja|秋のIndication}}" |rowspan="1"|Yoko Minamino |
| scope="row"|October 12
|rowspan="1"|"Nanpasen" |rowspan="1"|Akina Nakamori |
| scope="row"|October 19
|rowspan="1"|"Catch Me" |rowspan="1"|Miho Nakayama |
| scope="row"|October 26
|rowspan="1"|"{{ill|Remember (Kazama Sisters song)|ja|Remember (風間三姉妹の曲)|lt=Remember}}" |rowspan="1"|Kazama San Shimai |
| scope="row"|November 2
|rowspan="1"|"{{ill|Kiss wo Tomenai de|ja|キスを止めないで}}" |rowspan="1"|Kyōko Koizumi |
| scope="row"|November 9
|rowspan="1"|"{{illm|My Truth (The Alfee song)|ja|My Truth|lt=My Truth}}" |rowspan="1"|The Alfee |
| scope="row"|November 16
|rowspan="1"|"{{ill|Pearl-White Eve|ja|Pearl-White Eve}}" |rowspan="1"|Seiko Matsuda |
| scope="row"|November 23
|rowspan="1"|"{{ill|ABC (Songs for Boys)|ja|ABC (少年隊の曲)}}" |rowspan="1"|Shonentai |
| scope="row"|November 30
|rowspan="1"|"Show Me" |rowspan="1"|{{ill|Yukari Morikawa|ja|森川由加里}} |
| scope="row"|December 7
|rowspan="1"|"{{ill|Glass no Jūdai|ja|ガラスの十代}}" |rowspan="1"|Hikaru Genji |
| scope="row"|December 14
|rowspan="1"|"{{ill|Haikara san ga Toru|ja|はいからさんが通る (南野陽子の曲)}}" |rowspan="1"|Yoko Minamino |
| scope="row"|December 21
|rowspan="5"|"Glass no Jūdai" |rowspan="5"|Hikaru Genji |
| scope="row"|December 28 |