Career
He was represented by OYS Produce. He was most known for the roles of Ashuraman, The Omegaman, Prisman (Kinnikuman: Scramble for the Throne), Genji Togashi ( Otokojuku), Flazzard (Dragon Quest: Dai"s Great Adventure), Tarantula Arachne (Saint Seiya), and Ein (Fist of the North Star). Yamaguchi died on October 24, 2011, due to illness.