He worked tirelessly to ensure that Nobunaga would succeed to headship over the Oda clan, as well as to unify Owari province, and in 1555 earned special distinction by striking down Nobutomo ODA during Nobunaga's assault on Kiyosu-jo Castle.
信長の家督相続と尾張統一に尽力し、弘治元年（1555年）の信長による清洲城攻めでは織田信友を討つ功績を挙げた。