As the battle in which the Tokugawa army surrounded Kakegawa prolonged, Shingen violated the agreement and increased oppression on Totomi, and Ieyasu sought to make peace with Ujizane.
徳川軍による掛川包囲戦が長期化する中で、信玄は約定を破って遠江への圧迫を強め、家康は氏真との和睦を模索する。