Not only the expansion of his power was watched out, but also Nagamasa KIZAWA, his senior vassal, who was uniquely plotting to strengthen relations with Harumoto, defected from him and moreover, he was attacked by the allied forces which was formed including Tanenaga HATAKEYAMA of the Bishu family, the natural enemy of the same clan.
勢力拡大を警戒されたばかりか、晴元との関係強化を独自に画策する重臣・木沢長政には離反された上、これ等に同族の天敵である尾州家・畠山稙長まで加わった連合軍を形成され、攻撃を受ける。