Michiko Koga (Japanese: 古賀美智子, Hepburn: Koga Michiko), known professionally as F Chopper Koga (FチョッパーKOGA, Efu Choppā Koga), is a Japanese bass player and leader of the rock band Gacharic Spin. She has released two DVD instructional videos for her signature slap-bass technique. Koga is also a former model and a founding member of the bands the Pink Panda and Doll$Boxx.
