The academic world which has known that Korea and Japan moved in the south of China. After all these races which transferred themselves from the north to the south. They said that also rices were passed through the south of China, but its place is the north. It is a Langyadao that is native to just the north. If so, what kind of ship? sea of Huanghai and east sea or sea of Bohai and Huanghai? When we consider a matter in all aspects, it is nearly possible more the north than the south most scholars is believing.