While the Amago army was initially dominant due to the advantageous location, Motoharu KIKKAWA found it difficult to defeat the Amago army and obtained information about a by-path from local residents and went up to the top of Fubeyama from the rear side of the mountain, leading a separate battalion of troops.
戦いは当初地の利に勝る尼子勢が優勢だったが、攻め落とすのが難しいと判断した吉川元春が住民に間道を教えてもらい、別働隊を率いて裏から布部山の頂上に登った。