Among the researchers who support the Kyushu dynasty theory, opinions are varied and not fixed, some people regard the period until the battle of Hakusukinoe as the history of the Kyushu dynasty while other people regard the period until the Jinshin rebellion or the period until the Taika Reforms as the history of the Kyushu dynasty.
また、九州王朝説の支持研究者間でも、白村江の戦いまでを九州王朝の歴史と見る、壬申の乱までを九州王朝の歴史と見る、大化の改新まで九州王朝の歴史と見る等考え方は様々であり定まっていない。