In the remains found in the southern Kanto region and southern Kyushu in the first half of the earlier period, the cookware for plant foods such as stone dishes, mill stones, hammer stones, and heat-treated earthenware grew in size and the number of excavated objects increased.
南関東や南九州の早期前半の遺跡では、植物質食料調理器具である石皿、磨石、敲石、加熱処理具の土器も大型化し、出土個体数も増加する。