On December 26, Hideyoshi, who had earlier assigned Keijun MIYABE to the Sanin region and Masakatsu HACHISUKA to the Sanyo region to deal with the Mori clan, broke the truce and led his large army to Omi Province, attacking Nagahama-jo Castle (Omi Province).
12月2日(旧暦)（12月26日）、秀吉は毛利氏対策として山陰は宮部継潤、山陽は蜂須賀正勝を置いた上で、和睦を反故にして大軍を率いて近江国に出兵、長浜城(近江国)を攻撃した。