Okiayu Ryoutarou
- Aestivalis no March
- KICA-345 : Ashita no Kanchou wa Kimi da! (Nadesico)
- KICA-772 : Kidou Senkan Nadesico Complete CD-Box Disc 2 of 10 (Nadesico)
- Forever Love
- KICA-490 : Nadesico, Oshare Club (Nadesico)
- KICA-491 : Nadesico, Zoku Oshare Club (Nadesico)
- KICA-776 : Kidou Senkan Nadesico Complete CD-Box Disc 6 of 10 (Nadesico)
- KICA-777 : Kidou Senkan Nadesico Complete CD-Box Disc 7 of 10 (Nadesico)
- Rain
- APCM-5040 : Marmalade Voice (Marmalade Boy)
- COCX-32230 : Marmalade Boy Zenkyokushuu Disc 1 (Marmalade Boy)
- Together
- KICA-490 : Nadesico, Oshare Club (Nadesico)
- KICA-491 : Nadesico, Zoku Oshare Club (Nadesico)
- KICA-776 : Kidou Senkan Nadesico Complete CD-Box Disc 6 of 10 (Nadesico)
- KICA-777 : Kidou Senkan Nadesico Complete CD-Box Disc 7 of 10 (Nadesico)
- With You ~mabushii kisetsu e~
- APCM-9005-2 : Marmalade Boy Final Edition Disc 2 (Marmalade Boy)
- COCX-32231 : Marmalade Boy Zenkyokushuu Disc 2 (Marmalade Boy)
- Young Soul Rebel
- VICL-40160 : Seiyuu Graffiti (Twin Best) disc2 (Seiyuu-Compilation)
- kodou ~Whenever~
- VICL-61141 : D.N.Angel Original Soundtrack I (D.N.Angel)
- VICL-61145 : D.N.Angel Vocal Collection (D.N.Angel)