An Archaeological History of Japan, 30,000 B.C. to A.D. 700 - Koji Mizoguchi, 孝司·溝口 - Google Books

https://books.google.de/books?id=KQNG5gigLA8C

A notion widely shared among the Japanese is that a unique culture has existed uninterrupted on the archipelago since the first human settlements more than 30,000 years ago. The idea of a continuous shared Japanese culture, often described as…