The earthenware in this time period is classified into three styles, Northeast Asia, North/Center China and South China and in terms of the distribution, the Northeast Asian style earthenware was excavated in Hokkaido to eastern Japan, the North/Center China style earthenware was excavated in western Japan, and the South China style earthenware was excavated in southern Japan.
この時期の土器は北東アジア系、華北・華中系、華南系の3系統に分けられており、分布面から見ると北東アジア系は北海道から東日本に、華北・華中系は西日本、華南系は南日本から出土している。