At this time, Katsuie SHIBATA, who had been on Nobunaga's side after the Battle of Inou, informed him and Nobunaga who noticed the plan asked Nobukatsu to come to the Kiyosu-jo castle telling him a lie that he became sick, and killed him.
このとき、稲生の戦いの後より信長に通じていた柴田勝家の密告があり、事態を悟った信長は病いと称して信勝を清洲城に誘い出し殺害した。