Grandmaster Yoon Byung-In was the first Korean national
to bring the martial art of chu'an fa (commonly called kung
fu in the U.S.) back to Korea after studying in Manchuria and
World War II, he went to Nihon University, Tokyo, where he
studied karate with Toyama, Kanken. (See Byung
In Yoon: Another Story)
1950, during the Korean War, Grandmaster Yoon went to North
Korea and all contact with him was lost.
Grandmaster Kim Soo was finally contacted by members of Grandmaster
Yoon's family in 2005 and traveled to South Korea in Dec.
of 2005 to meet with them. You can see photos and learn about
his trip here.
In May of 2006 Grandmaster Kim Soo was contacted by Grandmaster
Yoon's son, Yoon Tae-won, that Grandmaster Yoon Byung-In died
of lung cancer on April 3, 1983.