Fumio Demura (出村 文男, Demura Fumio; September 15, 1938 – April 24, 2023) was a Japanese–American karateka and kobudoka, based in the United States since the mid-1960s. A 9th dan in Shitō-ryū karate, he was Pat Morita's martial arts stunt double in the first, third and fourth Karate Kid films, and was one of the inspirations for the character Mr. Miyagi. (Via Wikipedia)