The Koei-Kan system of Karate was founded by Master Eizo Onishi in 1952. He established his first official “dojo” on April 2, 1954 in Kanagawa-Ken, Japan.

Master Onishi was a senior student of two very famous and prominent Okinawan Karate instructors, Master Kanken Toyama (1888-1966) and Master Juhatsu Kiyoda (1888-1967). He also studied Chinese fistic arts with various teachers, particularly, Master Koichi Kyo (Japanese pronunciation), a university professor from Taiwan. Master Onishi also studied traditional Japanese Martial Arts, such as, Judo, Kendo, Jodo.