嘉納治五郎
In 1924, Gichin Funakoshi, a contemporary of Chibana sensei and also a pupil from Ankō Itosu, adopted the Dan system from judo founder Kanō Jigorō using a rank scheme with a limited set of belt colors to promote Karate-Do among the Japanese. In 1960, this practice was also adopted in Okinawa.