The Tokugawa rule in Japan, also known as the Edo period (1603–1868), was a pivotal era in Japanese history that laid the groundwork for the transformation of Japan into a modern nation-state during the Meiji Restoration and beyond. Though the timeframe of the Tokugawa rule predates the formal start of "modern" East Asia (1868), understanding this period is crucial for comprehending the structural, political, social, and ideological frameworks that influenced the trajectory of Japan’s modernization in the late 19th and early 20th centuries. The Tokugawa shogunate was a feudal military government established by Tokugawa Ieyasu after his victory at the Battle of Sekigahara in 1600. It endured for over two and a half centuries and was marked by stability, isolationist foreign policies, rigid class hierarchies, and a highly controlled political order. The Tokugawa shogunate was founded on a complex system of centralized feudalism. The shogun, based in Edo (modern-day Tokyo), exercised real power, while the emperor in Kyoto remained a symbolic figurehead with little direct political influence. The Tokugawa regime established a hierarchical, yet decentralized, structure by allowing local daimyo (feudal lords) to maintain control over their domains, provided they pledged loyalty to the shogunate. The system was formalized in the sankin-kōtai, or alternate attendance system, which required daimyo to spend every other year in Edo, leaving their families there as virtual hostages when they returned to their domains. This mechanism curtailed the power of the regional lords, drained their resources, and allowed the shogunate to monitor and control them effectively. One of the defining features of Tokugawa rule was the implementation of the class system based on Confucian principles, which divided society into four main classes: samurai, farmers, artisans, and merchants. The samurai were at the top of this hierarchy and served as administrators and bureaucrats, especially after their military function became obsolete during the long period of peace. The peasants, who were engaged in agriculture, were considered essential to the economy and morally superior to merchants. Merchants, despite their growing economic influence, were ranked lowest due to Confucian disdain for profit-making. This rigid social order, known as the "shi-no-ko-shō" system, helped maintain societal stability, though it became increasingly strained