Speculation was rife that someone in power was buried in the stone coffin, which dates back to the second half of the Yayoi Period (c. 1000 B.C.-250 A.D.), when the Yamatai state is believed to ...

The archaeologists identified another artifact from the same site as ... a sort of ‘technopolis’ of the Yayoi Pottery Culture Period, and that the Yayoi people were using the decimal system ...