Earthenware was manufactured in each settlement and it is vaguely believed that the material was self-sufficient in each settlement, but there was hardly any case of ancient structural remnants for earthenware manufacturing found.
土器の生産は集落ごとに行われ、集落ごとに自給自足によりまかなわれたと漠然と考えられているが、土器生産に関する遺構はほとんど事例がない。