used Yayoi pottery and Ainu used Jomon pottery.

After World War II, Kotondo Hasebe and Hisashi Suzuki claimed that the origin of Japanese people did not lie in newcomers from the Yayoi period (300 BCE - 300 CE) but people from the Jomon period. However, Kazuro Hanihara announced a new racial admixture theory in 1984 and a "dual structure model" in 1991. According to Hanihara, modern