However, in 1569, the agreement was nullified by Shingen unilaterally, and in addition, his Totomi Province was invaded by Nobutomo AKIYAMA from Shinano Province.
しかし永禄11年（1569年）、信玄からは一方的に協定を破棄された上、信濃国から秋山信友に遠江国への侵攻を受けてしまう。