The foundation of sovereignty was still underdeveloped during those days, and the position of the Okimi was nothing more than that of a leader of chiefs, assigned to each region of the coalition government; the Yamato regime during the 5th century can be described as the 'diarchy of Okimi and Katsuraki clan' as the historian Kojiro Naoki has decribed.
当時の王権基盤は未熟な段階にあり、大王の地位が各地域の首長から構成される連合政権の盟主に過ぎなかったことを考慮すれば、直木孝次郎の説くように、5世紀のヤマト政権はまさに「大王と葛城氏の両頭政権」であったと表現出来る。