Ossenberg, Nancy (see reference) has the best evidence of this relationship with the Jōmon. Also, a newer study, Ossenberg, et al., "Ethnogenesis and craniofacial change in Japan from the perspective of nonmetric traits" (Ossenberg, Nancy Suzanne; Dodo, Yukio; Maeda, Tomoko; Kawakubo, Yoshinori (2006). „Ethnogenesis and craniofacial change in Japan from the perspective of nonmetric traits”. Anthropological Science. 114 (2): 99—115. doi:10.1537/ase.00090.) is an updated analysis published in 2006 which confirms this finding.