When he was two years old, Nobumoto MIZUNO (a brother of Odai), who had become the head of the Mizuno clan after the death of Tadamasa MIZUNO, came to belong to the Oda family in Owari Province.
2歳の時、水野忠政の没後水野氏の当主となった水野信元（於大の兄）が尾張国の織田氏に従属した。