A power struggle for succession to the throne started, in which Umako killed Anahobe no Miko, who was backed by Moriya, under an imperial edict of Toyomikekashikiyahime no Sumera Mikoto, the wife of Emperor Bidatsu, and raised a large army with powerful regional clans and princes to defeat Moriya.
皇位を巡って争いになり、馬子は、豊御食炊屋姫（敏達天皇の皇后）の詔を得て、守屋が推す穴穂部皇子を誅殺し、諸豪族、諸皇子を集めて守屋討伐の大軍を起こした。