According to "Nihonshoki," Emperor Ninken and Emperor Kenzo had already been discovered in the administration of Emperor Seinei and the successor issue was solved, but after the demise of Emperor Seinei, Oke no mikoto (億計尊) and Oke no mikoto (弘計尊) ceded the Imperial Throne and Iitoyo no himemiko engaged in state affairs in Oshinumi no tsunosashi no miya (Tsunosashi Shrine in Oshimi-gun, Katsuragi City, Nara Prefecture is the traditional place) and called herself 'Oshimi Iitoyo ao no mikoto.'
『日本書紀』によれば、清寧天皇の治世中にすでに仁賢天皇（おけのみこと）と顕宗天皇（おけのみこと）は発見されており、後継問題は解決されていたが、清寧天皇崩御後に億計尊と弘計尊が皇位を相譲したため、飯豊青皇女が忍海角刺宮（おしぬみのつのさしのみや、奈良県葛城市忍海郡の角刺神社が伝承地）で執政し、「忍海飯豊青尊」と称したという。