The lord of Yagi-jo Castle at that time, Kunisada NAITO, was killed in the battle of Honbaigo, and Sadafusa NAITO who entrenched himself in Yagi-jo Castle was also killed, thus, the castle fell to the army of Motokiyo HATANO.
当時の八木城の城主であった内藤国貞は本梅郷の戦いで討死し、八木城で立て篭もっていた内藤定房も討ち取り、波多野元清軍を前に落城してしまった。