| 1999.02.26 | Kareshi Kanojo no Jijou Act 2.0 (KICA-449) | Song |
| 1999.03.03 | Kakikuke Kikuko no Sasisuse Sonata (FSCA-10077) | Sing/Talk |
| 1999.03.26 | Setsu Getsu Ka (KICA-452) | Song |
| 1999.08.21 | Triangle Session 99 Drama CD Stage 1 (MMCM-0009) | Song/Talk |
| 1999.08.26 | Ani Raji GPX Special CD 99 | Talk |
| 1999.09.01 | Shiawase-san [Shiawase Croissant] | Song |
| 1999.11.25 | Triangle Session 99 Vocal Mini Album (MMCC-0011) | Song |
| 1999.12.22 | Seraphim Call 12 Seraphim Tachi no Seiya (PICA-7012) | Song |
| 2000.01.26 | Triangle Session Volume 3 (MMCC-0014) | Talk |
| 2000.02.16 | Seraphim Call Themesong Collection coupling 1 | Song |
| 2000.02.25 | Seraphim Call Ongaku Zenshuu Theme Song & BGM (PICA-7014) | Song |
| 2000.03.24 | Nanako Kaitaishinsho Ongakuteki Chou Ryouhou II (PICA-1200) | Talk |
| 2000.10.21 | Hand Maid May 1/6 Chara Meippai (VICL-60621) | Song |
| 2000.10.25 | Clamp Gakuen Kaiki Genshou Kenkyuukai Jiken File 1 (MMCC-4011) | Talk |
| 2000.11.22 | Clamp Gakuen Kaiki Genshou Kenkyuukai Jiken File 2 (MMCC-4012) | Talk |
| 2000.11.22 | Hand Maid May -Mou Ippai Ippai- () | Talk |
| 2000.12.20 | Clamp Gakuen Kaiki Genshou Kenkyuukai Strike Sparks () | Song {track 2, 4} |
| 2001.07.04 | True Love Story 3 Drama CD Term 1 (SCDC-096) | Talk |
| 2001.08.01 | True Love Story 3 Drama CD Term 2 (SCDC-103) | Talk |
| 2001.09.05 | True Love Story 3 Drama CD Term 3 (SCDC-125) | Talk |
| 2001.10.03 | Chance Triangle Session Vocal Album (AVCA-14227) | Song |
| 2002.01.23 | Seiyuu Best Talk Collection (SCDC-001544-001545) | Talk |
| 2002.02.20 | Memories Off 1st Concert Album -no cut album- (SCDC-159) | Song |
| 2003.09.20 | Drama CD Kaiketsu! Caramel Police sono 1 (FUJI-6) | Talk |
| 2003.11.21 | Drama CD Kaiketsu! Caramel Police sono 2 (FUJI-9) | Talk |
| 2004.02.18 | Memories Off Drama CD Omoide no Paltiita (SCDC-325) | Talk |
| 2005.02.23 | Memories Off Shudaika Zenshuu (KDCA-32) | Song |