However, at the Battle of Sekigahara in September, in 1600, the Toyotomi-side (the western army) including Mitsunari was defeated, and the main leaders including Mitsunari were executed or punished by being deprived of their domain.
が、慶長5年（1600年）9月の関ヶ原の戦いにおいて、三成ら豊臣方（西軍）は敗れ、三成ら主だった者はことごとく処刑、改易された。