After starting to move his forces, Mitsunari attacked Fushimi-jo Castle, guarded by Mototada TORII, a longtime senior vassal to Ieyasu, with a force of 40,000 soldiers, and in the fight, Mototada was killed and Fushimi-jo Castle came under Mitsunari (the Battle of Fushimi-jo Castle).
三成が挙兵すると、家康古参の重臣・鳥居元忠が守る伏見城が4万人の軍勢で攻められ、元忠は戦死し伏見城は落城した（伏見城の戦い）。