Founded by Pyang, Yon Kue (aka. Yun-Gae Byang, or Yun-Kwei Byong).
The Song-moo-kwan (pine tree training hall or the ever youthful house of martial arts training) was founded by Ro Byung Jik in Kae Song. Its power and customs were the weakest among the first big five Kwans.
Beginning in 1936, Ro studied Shotokan karate in Japan under Shotokan founder, Gichin Funakoshi, along with chung do kwan founder, Lee, Won Kuk. Song moo kwan was founded in Kae Song City, Kyung Ki Providence, Korea by Ro, Byung Jik on March 11, 1944 when Ro returned to Korea and taught youngsters karate as a hobby at an archery place, the Kwan Duk Jung in Kaesong, which was quickly forced to close due to the repressive political conditions.