As a result, Tatsusaburo HAYASHIYA and others even insisted a theory that Shoki modified the year in order to hide the fact that the Imperial Court was split into a group which supported the Emperor Ankan and the Emperor Senka and another which supported their younger half brother Emperor Kinmei (a theory of collateral two Imperial Courts) (For details, refer to the article on the Emperor Kinmei).
そのため、安閑天皇・宣化天皇を擁立する勢力と、異母弟の欽明天皇を奉ずる勢力の間で朝廷が分裂しており、書紀がその事実を隠蔽するために年代をずらしたとの林屋辰三郎らによる説（二朝並立説）まで登場した（→詳細は欽明天皇の項を参照）。