In 1930, while Korea and China were occupied by Japan a trade ban was announced on the sale of pure and artificial silk. As a result a black market in these goods flourished, it was called ‘dobinori’. Sirasoni joined the Yalu River (a group of well meaning ruffians ) to get away from the Japanese police, while their Korean President of the Nagasima Wood Company in Shinuiju asks the Yalu River groupfor held to deal with the trouble making Japanese police Chief.
