At the time of the Battle of Sekigahara, Hisanobu fought on the Toyotomi side, although his father defected to the Tokugawa side and burned down his castle in Hirado as a gesture of loyalty to the new shōgun, Tokugawa Ieyasu.
At the time of the Battle of Sekigahara, Hisanobu supported Toyotomi. Meanwhile, his father switched sides to Tokugawa and burned down their castle in Hirado as a gesture of loyalty to the new shōgun, Tokugawa Ieyasu.