(a) Geographic locations of the Hamanaka 2 site from which NAT002 was excavated, the Funadomari site from which F23 was excavated, and other archaeological sites of the Okhotsk culture, and geographic ranges of the Okhotsk culture and neighboring cultures. (b) Skeleton of the adult female of the prehistoric Okhotsk culture (NAT002) from the Hamanaka 2 site. (c) The left clavicle of NAT002. Hyperostosis can be observed on the surface.