Ieyasu Tokugawa was a prominent Japanese leader who founded the Tokugawa shogunate, which ruled Japan from 1603 to 1868. Born in 1543, he played a crucial role in unifying Japan after a long period of civil war known as the Sengoku period. His strategic alliances and military victories, particularly at the Battle of Sekigahara in 1600, solidified his power. As shogun, Ieyasu implemented policies that promoted stability and economic growth. He established a centralized government and enforced strict social hierarchies, which helped maintain peace during the Edo period. Ieyasu's legacy continues to influence Japanese culture and history today.