Goju Ryu Karate by Gogen Yamaguchi

Jitsumi Gōgen Yamaguchi (山口剛玄; January 20, 1909 – May 20, 1989), also known as Gōgen Yamaguchi, was a Japanese martial artist and student of Gōjū-ryū Karate under Chōjun Miyagi.[6] He was one of the most well-known karate-dō masters from Japan and he founded the International Karate-dō Gōjū Kai Association.[7]