Claim: Genetic and anthropometric studies on Japanese people have included speculation of a common origin from the Jōmon period. period by scholars such as Arai Hakuseki and Fuji Sadamoto until Kotondo Hasebe and Hisashi Suzuki claimed that the Japanese were descended from people in the Yayoi period.
Evidence: A common origin of Japanese has been proposed by a number of scholars since Arai Hakuseki first brought up the theory and Fujii Sadamoto, a pioneer of modern archaeology in Japan, also treated the issue in 1781. But after the end of World War II, Kotondo Hasebe and Hisashi Suzuki claimed that the origin of Japanese people was not the newcomers in the Yayoi period (300 BCE – 300 CE) but the people in the Jōmon period. According to Hanihara, modern Japanese lineages began with Jōmon people, who moved into the Japanese archipelago during Paleolithic.