| background vocals | Al『Love Again』(2001.11.21 WPC6-10179) |
| Background Vocals | Al『EXPANSION』(2000.08.23 HDCA-10046) |
| MONACO MOO | FEMALE VOCALS | Maxi『MONACO MOO』(2000.04.19 MVCH-1203) Al『非情のライセンス』(2000.09.27 UUCH-1003) |
| Female vocals | Al『非情のライセンス』(2000.09.27 UUCH-1003) |