Chogun Miyagi (1888 – 1953)
Miyagi developed his style combining his studies under Okinawa’s Kanryo Higaonna and his travels and training to China.
Gogen Yamaguchi (1909-1989)
Gogen Yamaguchi was already a reputable karate-ka of Goju before he met its founder (Chogun Miyagi) around 1930. Miyagi became so impressed with Yamaguchi that he made him his successor for Goju in Japan.
While many karate styles incorporate Saifa, GKR derives its version from Japanese Goju (not the more Chinese appearing Okinawan Goju version).