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Myung Jae Ok was born in Jeollanam-do province, South-Korea in 1938. He studied hapkido with his younger twin brother Myung Jae Nam. Myung Jae Ok played an important role in his younger brother's organization for a while. The two brothers later went their own separate ways and Myung Jae Ok founded his own martial art which he called Hoi Jeon Moo Sool.
Myung Jae Ok wrote several books about Hoi Jeon Moo Sool and travels the world to promote his martial art. He lives in Incheon.
