Kimiko Kasai (born December 15, 1945 in Kyoto, Japan) is a retired Japanese jazz singer. She is now a jewelry designer.

Kimiko went to Tokyo in 1964, and became a featured member of pianist Yuzuru Sera's group. Kasai is referred to by her nickname of "Kemeco", also a song on one of her earliest recorded works, "The Modern Playing Mate" by Yuzuru Sera Trio Introducing Kimiko Kasai from 1968 (and recently reissued on compact disc in Japan).