Koichi Domotot
Artist with "Deep in your heart/+ MILLION but - LOVE" album

Koichi Makigami
Artist with "Koroshi no Blues" album

Koichi Sugiyama
Artist with the following albums: "Symphony "IDEON"", "Dragon Quest VII ~Warriors Of Eden~ On Piano", "Dragon Quest IV Concert Live 2002", etc...

Koichi Sugiyama & Bob Sakuma
Artist with "TV Original BGM Collection: Gatchaman" album

KOICHI YABORI
Artist with "Guess Where I Am" album

Koichi Yabori_Jiro Okada Hideo_Yamaki
Artist with "Elevation" album

Koichi Yamadera
Artist with "Cube/9" album

Koichiro Kameyama
Artist with "Mirage of Blaze OST - SVWC 7091" album