Paik noted these sessions mirrored those he attended regularly under Grandmasters Yoon and Kim in Korea.
By the 1960s, there were nine major kwans, which were based on an original five: the Chung Do Kwan (Won Kuk Lee), Moo Duk Kwan (Hwang Kee), Song Moo Kwan (Ro Byung Jick), Chang Moo Kwan (Yoon Byung-In) and Jidokwan (Chun Sang Sup).
Lee Byung-hun | Yoon Byung-In | Yoon Jeong-hee | Yoon | Kim Byung-man | Choi Jeong-yoon | Bora Yoon | Yoon Yeo-jeong | Yoon Jong-shin | Yoon Jin-yi | Yoon Jang-ho | Yoon Bora | Park Ji-yoon | Kim Ji-Yoon |