Japan transitioned to a feudal system during the rise of feudalism. Power shifted to powerful families and military leaders known as shoguns, who held real political power while the emperor became a figurehead. This decentralized system was consolidated by Tokugawa Ieyasu, who established the Tokugawa Shogunate in 1603 that relied on feudal hierarchies and emphasized social order and control. The shogunate gradually closed Japan off from foreign influence by the mid-1600s due to fears of Christianity and foreign domination.