In 1582, when Nobunaga was assassinated by Mitsuhide AKECHI in the Honnoji no Hen (Conspiracy of Honno-ji Temple), he joined Hideyoshi HASHIBA, who came back from the attack in the Chugoku region; and in the Battle of Yamazaki, he lead 4000 troops, acted as the spearhead in the right wing, beat Mitsuhide, and became the chief vassal of Oda family.
天正10年（1582年）、本能寺の変で信長が家臣の明智光秀に討たれると、中国攻めから引き返した羽柴秀吉に合流、山崎の戦いは兵4000を率いて右翼先鋒を務めて光秀を破り、織田家の宿老に列する。