Here is a list of Tanaka's best fights. For a list of Tanaka's losses, refer to "Koichi Tanaka Losses".
On May 26, 2012 Koichi Tanaka faced off against Manabu Kano in a lightweight bout at age 40. He was coming in with a record of 3-11-1 (3). Tanaka stopped Manabu Kano via submission.