Kobayashi Yumiko CDs (singles)
Yumiko appears (sings/talks) in the following CD singles.
| 1999.11.03 | Ai (Chuuseishin) [Excel Girls] | Song |
| 2001.01.24 | Melody (LACM-4004) | Song |
| 2001.07.04 | Egao ga No.1! Yapparine (KICM-3011) | Song |
| 2003.12.21 | Sister Princess Xmas Song Collection (KICM-3048) | Song/Talk |