秋山成勲
After the contract termination of PRIDE, Kang moved to K-1 Hero's maintaining the championship of Spirit MC. Kang made his K-1 Hero's debut on October 28, 2007, in "K-1 Hero's in Seoul". His opponent was Yoshihiro Akiyama who was returning to MMA after a 10-month suspension. Kang lost via TKO.