> there exist several points which may suggest some relation between [China and Japan], such as the basic similarities in the age at commencement of ablation, the prevalence of extraction of under incisors from the Late Jomon period in western Japan and the existence of the same type of ablation in the peoples of nearly the same period in China.
Especially, as the abrupt increase of extraction of the upper lateral incisors in the people of the Yayoi period, such as Doigahama, who show morphological resemblances with the neolithic people of northern China, may suggest the influence of Chine…