Ａｂｏｕｔ １００００B．C ｔｏ ３００Ｂ．Ｃ

jomon bunka-hunting and fishing ages in ancient japan.
This period extended from about 10000B.C. to 300 B.C.

As people felt power from great nature than now, these kind of pottery have strong energy.
They are resemble to african arts.