However, despite the opposition of the kuni no miyatsuko of provinces including Kibi Province and Tsukushi Province (Iwai War in 527), it is thought from the fact that this reflects the unification of the nation that it was this period in which ancient Japan was established.
しかし、吉備国造や筑紫国造（527年の磐井の乱）などの反抗もあったが、古代国家統一の情勢にあり、日本の古代国家の成立期に当たると考えられている。