Kōji Fujiyama was a Japanese actor known for his work with Daiei and Toei Studios in the 1960s and 70s. He is perhaps best known for his appearances in the Gamera series, as well as in various horror, yakuza, and samurai films. He also appeared on television, including many detective dramas and historical dramas. His former stage name is Kōichi Fujiyama. He belonged to OT Kikaku after working at Daiei and Toei. On February 22, 1983, he was arrested in Yokohama for allegedly using stimulants at home. On April 22 of the same year, the Yokohama District Court sentenced Fujiyama to one year and two months in prison, suspended for three years. No appearances have been confirmed since the same year, and his whereabouts after that are unknown.