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Kosaka Riyu

Kosaka Riyu (2013)

Kosaka Riyu (小坂りゆ) is a Japanese pop under the label 5pb. She made her debut in the Bemani line of music simulation video games from Konami, including Dance Dance Revolution, as a first generation member of BeForU.



BeForU Beginnings

On November 20, 2000, Konami and Toshiba-EMI held auditions to form a J-pop group, BeForU. Many people auditioned, and Kosaka, who was then fifteen years old, was one of four who joined the group. The group originally made songs for Bemani games and released their first song "DIVE". After Dive's success, BeForU produced more tracks for Dance Dance Revolution, including "DIVE: More Deep and Deeper Style" and "Firefly". This was when Kosaka got her first solo single, "true...". The song was a success in the DDR community, and Kosaka continued to release other songs in Bemani both with BeForU and as a solo singer.

Solo Career

In 2004, the band's first album, BeForU, was released, containing some solo work by Kosaka. In the same year, her first full solo album, begin was released. Since then, Kosaka released various singles both on her own and with BeForU, as well as a new album with the group. In 2007, she recorded a song for the film Kamen Rider The Next, "Platinum Smile". In December 2007, she released her sixth single, "Kokoro no Ato". The song was used in the anime Mokke. In 2008, she released her second studio album, every struggle. Due to the break-up of BeForU in late 2008, she did not produce any solo works for some time, until her release in 2010 on the compilation album Kimi ga Kiroeru, for the PC game Amatsu Misora ni!.


Kosaka Riyu promoting "Platinum Smile" (2007)
Kosaka Riyu promoting every struggle (2008)
Kosaka Riyu promoting "Saisho no MELODY" (2011)






  • [2001.11.21] DDRMAX DanceDanceRevolution 6thMIX (Disc 01/ #4 & Disc 02/Track 17: true ~radio edit~, Disc 01/Track 34: true... ~Trance Sunrise Mix~, Disc 01/Track 40: true... (Full Version).)
  • [2002.05.16] V-RARE SOUND TRACK 1 (Track 06: Firefly -RIYU VERSION-.)
  • [2002.06.19] DDRMAX2 DanceDanceRevolution 7thMIX (Disc 01/Track 14 & Disco 02/Track 39: DIVE TO THE NIGHT, Disc 01/Track 17 & Disc 02/Track 07: CANDY♥.)
  • [2003.02.27] V-RARE SOUND TRACK 4 (Track 05: CANDY (☆live a little style☆), remixed by NAOKI MAEDA.)
  • [2003.02.05] pop'n music 9 AC ♥ CS pop'n music 7 (Disc 01/Track 27: ☆shining☆ with Noria.)
  • [2003.03.19] GUITARFREAKS & drummania BEST TRACKS (Disc 01/Track 04: begin.)
  • [2003.03.26] DanceDanceRevolution EXTREME (Disc 01/Track 05 & Disc 02/Track 27: LOVE♥SHINE.)
  • [2003.04.24] V-RARE SOUND TRACK 5 (Track 07: glacial (radio edit).)
  • [2003.09.18] beatmaniaIIDX 9th style Original Soundtrack (Disc 01/Track 29: LOVE♥SHINE.)
  • [2003.12.17] GUITARFREAKS 10thMIX & drummania 9thMIX Soundtracks (Disc 01/Track 02: ヒマワリ (Himawari).)
  • [2004.05.19] beatmaniaIIDX 10th style Original Soundtrack (Disc 01/Track 22: SHOOTING STAR.)
  • [2004.06.23] GUITARFREAKS 11thMIX & drummania 10thMIX (Disc 01/Track 15: ☆shining☆ (GF&dm style) with Noria.)
  • [2005.03.24] V-RARE SOUNDTRACK 10 (Track 02: LOVE♥SHINE [Tropical mix], remixed by Mr.T.)
  • [2005.11.28] Pakedio Channel Vol.1 (Track 02: Little Wings)
  • [2005.10.19] beatmaniaIIDX12 HAPPY SKY ORIGINAL SOUNDTRACK (Disc 02/Track 04: ヒマワリ (Himawari).)
  • [2005.12.22] Pakedio Channel Vol.2 (Track 06: Lum no Love Song)
  • [2006.01.12] Pakedio Channel Vol.3
  • [2006.08.25] Sky Girls ~Opening Theme "Baby's Tears / Kosaka Riyu" & Original Soundtrack~
  • [2006.10.27] pop'n music 14 FEVER! AC ♥ CS pop'n music 12 Iroha & 13 Carnival (Disc 03/Track 27: HONEY♂PUNCH,)
  • [2007.01.25] DanceDanceRevolution SuperNOVA ORIGINAL SOUNDTRACK (Disc 01/Track 08 & Disc 02/Track 24: HONEY♂PUNCH, Disc 01/Track 12 & Disc 02/Track 31: Baby's Tears)
  • [2007.03.08] GUITARFREAKS V3 & DRUMMANIA V3 SOUNDTRACKS (Disc 01/Track 16: 大和撫子魂 (Yamato Nadeshiko Damashi).)
  • [2010.06.30] Amatsu Misora ni! Soundtrack (Track 03: Kimi ga Kiroeru, Track 36: Kimi ga Kiroeru (Short Ver.).)
  • [2018.06.02] Dynamite Dynamite Rev. -NAOKI SPECIAL ALBUM- (Track 05: Tori no Uta (鳥の詩)
  • [2020.08.13] TEARED (Track 01: TEARED feat.小坂りゆ)
  • [2020.10.25] BLUE & RED (Track 03 TEARED feat.小坂りゆ -NewMix-)



  • [2008.02.28] Riyu

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