弥生時代
The large-scale Yayoi period remains at the Yoshinogari site, Yoshinogari and Kanzaki in Saga Prefecture revealed examples of lead glass typical of the Yayoi period. In 2003, the excavation of a large Yayoi period settlement in Tawaramoto, Nara also revealed two large jade , one , the second in length. The larger Tawaramoto is the 10th-largest example found to date in Japan. Both jade from the site are of unusually high-quality brilliant green jade.