As Mori's support troops were unable to move on in face of the lake built by Hideyoshi, and finding that Nobunaga's support troops were coming, they decided to make peace with Hideyoshi.
毛利の援軍は秀吉の築いた湖を前にして身動きがつかず、さらに信長の援軍が送られてくることから、秀吉との講和を決意することとなった。