Since Nobunaga was confronting with Yoshikage, he couldn't dispatch the main force toward the Takeda army, and castles of the Oda and Tokugawa allied forces were captured one after another by the Takeda army.
信長は義景と対峙していたため、本隊を武田軍に向けることができず、織田・徳川軍は次々と武田軍に諸城を奪われた。