After Emperor Ojin passed away, he plotted to succeed the Imperial Throne, and with hundreds of soldiers, he raised an army against Iratsuko UJINOWAKI and Osasagi no miko (the later Emperor Nintoku) who were strong candidates for the succession, but when he was crossing the Yodo-gawa River on a ship, he drowned because Iratsuko UJINOWAKI who heard the story from Osasagi no miko that suspected Oyamamori no miko's plan, disguised himself as a ferryman and purposely capsized the ship.
応神天皇の崩御後、皇位を継ごうと企み、有力候補の菟道稚郎子・大鷦鷯皇子（後の仁徳天皇）らを殺害しようと数百の兵とともに挙兵するが、船で淀川を渡る際に、計画を察知した大鷦鷯皇子から話を聞いた菟道稚郎子が渡し守に紛し、船をわざと転覆させたため、水死した。