Jomon（縄文）Period (B.C. 13,100 to B.C. 300)
It is said that the Japanese island was born around 13,000 years ago which was divided from Eurasian continent because the ice age ended and the sea level began rising corresponding to rises in the atmospheric temperature.
The Japanese archipelago experienced a rise in the sea level of over 100 meters during this period; today it is called “the sea level rise of the Jomon period”.
People in these period, started to product an earthenware pottery with a straw-rope pattern. “Straw-rope pattern” is called as “縄文（Jomon）” in Japanese language character, and therefore, it is called as Jomon period for these era. The Jomon period had lasted for more than 10,000 years.
During Jomon Period, Japanese character had not developed yet and it is difficult to find how the people in Jomon period had spent there life. However we could imagine through research of garbages in some part.
Oomori-Kaiduka, a shell mound made in Jomon period was discovered by “Edward Sylvester Morse” who was a professor in Tokyo University in Meiji era. After that, a lot of shell mounds made in Jomon period had discovered all over Japan and various goods had found in these shell mounds.
Especially, human shape earthenware which is called “土偶（clay figure)” was discovered in various shell mound.
Above picture is one of a clay figure. You can see a characterictic eye. A clay figure wearing what resembles eye shades used by the Eskimos which was excavated in Aomori Prefecture in Japan.
Nowadays, it is believed that these clay figures were worships idols for the purpose of pray for women.