In July 2007, Kojima shocked the All-Japan Army when he betrayed them and joined the Voodoo Murders, where he was quickly made the group's co-leader along with TARU. Soon after joining, Kojima and TARU won the World Tag Team Championship from Toshiaki Kawada and Taiyō Kea. Kojima left the group in 2008 after returning from injury to side with his sworn friend Hiroyoshi Tenzan and to feud with the alliance of Great Bash Heel (Tenzan's former group) and the VooDoo Murders.