In 1974 Fumio Demura entered into the Hong Kong film industry and in 1977 he appeared in his first movie, The Island of Dr. Moreau. In the 1980s, Demura became involved in the Karate Kid series . He was the stunt double for Pat Morita, who played Mr. Miyagi. He continued to be the stunt double for Pat Morita in the television series O'Hara. Demura has appeared in several films and documentaries, including: The Warrior within (1976), (1989), Shootfighter: Fight to the death (1992), Rising Sun (1993),The next Karate Kid (1994),Masters of the martial arts, (1998, presented by Wesley Snipes), Mortal Combat (1995), Mystic origins of the martial arts (1998), Walker,Texas Ranger (2000) Modern warriors (2002),XMA: Xtreme Martial Arts (2003),and Ninja (2009).