 This marked the start of Sunpu Domain.In April 1606, Ieyasu officially retired from the post of "shōgun", and retired to Sunpu, where he established a secondary court, from which he could influence "Shōgun" Tokugawa Hidetada from behind the scenes.Subsequently, aside for brief periods, Sunpu was "tenryō" (territory under direct administration by the Shogunate), ruled by the , an appointed official based in Sunpu.