Koyama Yuka CDs (miscellaneous)
Yuka appears (sings/talks) in the following miscellaneous CDs.
| 1993.02.21 | Kataomoi (CRCP-20054) | Talk |
| 1995.07.21 | Marmalade Boy Vol. 7 Marmalade Summer | Song {8} |
| 1996.07.24 | Super Real Mahjong P VI Original Soundtrack | Song |
| 1996.12.04 | Eternal Melody drama CD (PCCB-234) | Talk |