Although none of the Emperors, Junna, Ninmyo, and Gosanjo, is a son of the former emperor, in the imperial edicts, they declare that the Imperial Throne was handed down according to the law that Emperor Tenchi established for the first time.
淳和天皇、仁明天皇、後三条天皇は前天皇の子ではないのに、即位詔では天智が初め定めた法に従って位を譲られたと述べている。