Tokugawa Iemitsu was the third shōgun of the Tokugawa shogunate in Japan, ruling from 1623 to 1651. He was the grandson of Tokugawa Ieyasu, the founder of the shogunate, and played a crucial role in consolidating power and stability in Japan during the early Edo period. Iemitsu is known for implementing strict policies that enforced isolationism, limiting foreign influence and trade. His reign saw the establishment of the Sankin-kōtai system, which required feudal lords to alternate their residence between their domains and the capital, Edo, strengthening central control over the daimyōs.