石井智宏
An accomplished karateka, Nakajima was hired by Riki Choshu's World Japan promotion in December 2002 at the age of 14. He debuted for World Japan (WJ) in September 2003, facing American fighter Jason Leigh in an MMA fight, winning via knockout in one minute and thirty-five seconds. His true professional wrestling debut came on the main event of World Japan's "RESOLUTION" card on January 5, 2004, losing via submission to Tomohiro Ishii.