and Hyūga Hayato attacked Japan, perhaps a precursor to the rebellion of 720. Skeletal findings Anthropological research on human skeletons of the Kofun period on southern Kyushu has shown that male skeletons found inland differ from those on the Miyazaki plain. Inland skeletons resembled those of Jōmon people and northwestern Kyushu Yayoi people, and some groups on the plain also resembled northern Kyushu Yayoi people. Additionally, skeletons excavated from late Yayoi-period ruins on Tanegashima are smaller than those found on Kyushu, and show signs of artificial cranial deformation. Notes References Nara period Tribes of ancient Japan