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.
| Issue date | Song | Artist(s) | Ref. |
|---|---|---|---|
| January 5 | "Yakusoku" | Mamiko Takai | [1] |
| January 12 | "White Rabbit Kara no Message" | Marina Watanabe | |
| January 19 | "Rakuen no Door" | Yoko Minamino | |
| January 26 | "Too Adult" | Minayo Watanabe | |
| February 2 | "No More Renai Gokko" | Onyanko Club | |
| February 9 | "Yuki Gani" | Yoshi Ikuzō | |
| February 16 | "Tango Noir" | Akina Nakamori | |
| March 2 | "Kashiko" | Ushiroyubi Sasaregumi | |
| March 9 | "Mizu no Rogue" | Kyoko Koizumi | |
| March 16 | "Stripe Blue" | Shonentai | |
| March 23 | "Sapphire no Hitomi" | The Alfee | |
| March 30 | "Kagerou" | Mamiko Takai | |
| April 6 | "Idol wo Sagase" | Momoko Kikuchi | |
| April 13 | "Hanashikake Takatta" | Yoko Minamino | |
| April 20 | "Marina no Natsu" | Marina Watanabe | |
| April 27 | "Pink no Chao" | Minayo Watanabe | |
| May 4 | "Strawberry Time" | Seiko Matsuda | |
| May 18 | "Toki no Kawa wo Koete" | Ushirogami Hikaretai | |
| May 25 | "Strawberry Time" | Seiko Matsuda | |
| June 1 | "Katatsumuri Samba" | Onyanko Club | |
| June 8 | "Mizu no Naka no Answer" | Kiyotaka Sugiyama | |
| June 15 | "Blonde" | Akina Nakamori | |
| June 29 | "Sayonara no Kajitsutachi" | Yōko Oginome | |
| July 6 | "Kimi Dake ni" | Shonentai | |
| July 13 | "Pandora no Koibito" | Yoko Minamino | |
| July 20 | "Wanderer" | Checkers | |
| July 27 | "Natsuyasumi Dake no Sidesheet" | Marina Watanabe | |
| August 3 | "Marionette" | Boøwy | |
| August 10 | "Amaryllis" | Minayo Watanabe | |
| August 17 | "Marionette" | Boøwy | |
| August 24 | "Kita no Tabibito" | Yujiro Ishihara | |
| August 31 | "Star Light" | Hikaru Genji | |
| September 7 | "Shade" | Kiyotaka Sugiyama | |
| September 14 | "Kindan no Telepathy" | Shizuka Kudo | |
| September 21 | "Niji no Dreamer" | Yui Asaka | |
| September 28 | "Naite Miryaii Jan" | Masahiko Kondō | |
| October 5 | "Aki no Indication" | Yoko Minamino | |
| October 12 | "Nanpasen" | Akina Nakamori | |
| October 19 | "Catch Me" | Miho Nakayama | |
| October 26 | "Remember" | Kazama San Shimai | |
| November 2 | "Kiss wo Tomenai de" | Kyōko Koizumi | |
| November 9 | "My Truth" | The Alfee | |
| November 16 | "Pearl-White Eve" | Seiko Matsuda | |
| November 23 | "ABC (Songs for Boys)" | Shonentai | |
| November 30 | "Show Me" | Yukari Morikawa | |
| December 7 | "Glass no Jūdai" | Hikaru Genji | |
| December 14 | "Haikara san ga Toru" | Yoko Minamino | |
| December 21 | "Glass no Jūdai" | Hikaru Genji | |
Toshinobu "Toshi" Kubota is a Japanese singer, songwriter, musician, music producer, and radio personality. He has produced six million-seller records and thirty-three Top 40 singles during his career. Kubota is currently part of Sony Music Japan. In addition, he has composed and written songs for many singers including Hiromi Iwasaki, Misia, Toshinori Yonekura, Kyōko Koizumi, and many other recording artists.
{{cite web}}: CS1 maint: archived copy as title (link)