Chang Moo Kwan was founded by Yoon, Byung In and Lee, Nam Suk, first as the "YMCA Kwon Bop Bu" (권법무) in 1946.
Chang Moo Kwan was founded by Lee, Nam Suk. Lee Nak Sok's teacher Byung In Yoon had founded the "YMCA Kwon Bop Bu" (권법무) in 1946.