After his father Ichinohe no oshiha no miko was murdered by Emperor Yuryaku, Oke no miko (written as "億計王" in Japanese, who was the future Emperor Ninken) and his younger brother Oke no mikoto (written as "弘計王" in Japanese, who was the future Emperor Kenzo) escaped and hid together.
安康天皇3年（456年）に父の市辺押磐皇子が雄略天皇に殺されると、弟の弘計王（後の顕宗天皇）と共に逃亡して身を隠した。