However, since Tsushima had such poor land that it could not absorb the surplus population within the territory, some Japanese people as well as people involved in trading began to settle in Sanpo, and these people were called kokyowa.
しかし対馬は土地が痩せ島内で過剰人口を吸収できず、交易従事者のみならず三浦に定住する日本人（恒居倭）が出現する。