After conquering Mino Province, as Nobunaga's territory had a border with Takeda's territory, Nobunaga established the friendly association with Shingen; when Shigen started invading Suruga, Nobunaga tried to reconciliate between Kai and Echigo with the help of Akiyoshi.
信長は美濃平定で武田領国と接していたため武田と誼を通じ、駿河侵攻に際しては将軍義昭に周旋して甲越和睦の調停を試みており友好路線をとっていた。