It is thought that some political powers, such as Yamato, Kibi and Chikushi, had grouped together and formed the Yamato Kingdom by the third century at the latest.
遅くとも3世紀中ばまでにヤマト・吉備・筑紫などの諸勢力が糾合し、初期ヤマト王権が形成されたと考えられている。