In 1600, during the Sekigahara campaign, Fuku's husband, Inaba Masanari, served Hideaki in the Western army led by Ishida Mitsunari. Due to the tensions Hideaki had with Mitsunari and the progression of the war being favorable to the Eastern army led by Tokugawa Ieyasu, it is said that Fuku and Masanari achieved the great feat of making Hideaki change sides and join the Eastern army. After Hideaki joined Ieyasu, Mitsunari's army was defeated, as a result of which the Fuku family obtained a large amount of spoils of war.