GM Yoon (center) with students for "Summer Special Training" at Ranji-do Island (near Seoul), Korea, 1946
GRANDMASTER BYUNG IN YOON
GM Byung In Yoon was the first Korean national to bring the martial art of Chu'an Fa (commonly called kung-fu in the US) back to Korea after studying in Manchuria and Shanghai, China.
During World War II, he went to Nihon University, Tokyo, where he studied karate with
In 1950, during the Korean War, GM Yoon went to North Korea and all contact with him was lost.