Even after Emperor Saimei died, Prince Naka no Oe did not succeed to the throne, according to "Nihonshoki" (Chronicles of Japan) or "The Anthology of Myriad [Ten Thousand] Leaves," it is said there was a person called 'Nakatsusumera-mikoto' during this period, there was a strong theory that she was said to be Princess Hashihito (Emperor Kotoku's Empress).
斉明天皇の崩御後も即位を先延ばしにしたが、この間は日本書紀や万葉集によると「中皇命（なかつすめらみこと）」と呼ばれた人物がいたらしく、これは間人皇女（孝徳天皇の皇后）のこととする説が有力である。