| Harmonie | Harmonie | KOKIA | 2014 |
| Star Blazers: Space Battleship Yamato 2199 | Kioku no Hikari | KOKIA | 2012 |
| Saiyuuki Gaiden | Sakura no Ki no Shita | KOKIA | 2011 |
| Saiyuuki Gaiden | Hikari no Hou e | KOKIA | 2011 |
| Broken Blade 5 | Fate | KOKIA | 2011 |
| Broken Blade 6 | Fate | KOKIA | 2011 |
| Broken Blade 6 | Nageki no Oto | KOKIA | 2011 |
| Broken Blade 4 | Fate | KOKIA | 2010 |
| Broken Blade 3 | Fate | KOKIA | 2010 |
| "Bungaku Shoujo" Memoire | Kotonoha | KOKIA | 2010 |
| Broken Blade | Fate | KOKIA | 2010 |
| Broken Blade 2 | Fate | KOKIA | 2010 |
| Phantom: Requiem for the Phantom | Karma | KOKIA | 2009 |
| Phantom: Requiem for the Phantom | Transparent | KOKIA | 2009 |
| Gunslinger Girl: Il Teatrino | Tatta Hitotsu no Omoi | KOKIA | 2008 |
| Japan, Our Homeland | Utau Hito | KOKIA | 2007 |
| Origin: Spirits of the Past | Chouwa oto ~with reflection~ | KOKIA | 2006 |
| Origin: Spirits of the Past | Ai no Melody | KOKIA | 2006 |
| Hungry Heart: Wild Striker | Tell Tell Bouzu | KOKIA | 2002 |
| Hungry Heart: Wild Striker | Watashi no Taiyou | KOKIA | 2002 |
| Brain Powerd | Ai no Rinkaku | KOKIA | 1998 |
