Buke shohatto (Laws for the Military Houses)

Timeline

1. 1615Fushimi Castle · KyotoAfter the Summer Campaign at Osaka destroyed the Toyotomi, Tokugawa Ieyasu ordered Koin-in Sōsen (Ishin Sōsen) and others to draft the ordinance, which he himself read to the assembled daimyo at Fushimi Castle; it was then formally promulgated by Shogun Tokugawa Hidetada. The thirteen articles required cultivation of both letters and arms, prohibited private marriages and unauthorized castle repairs, and ordered daimyo to report misconduct, rewriting Sengoku-era practices of decentralization into written law enforceable by the shogunate.
2. 1635Edo · EdoShogun Tokugawa Iemitsu reissued the Buke shohatto in Kan'ei 12, expanding the articles to nineteen. The new text specified that tozama and fudai daimyo must alternate yearly attendance in Edo (sankin-kotai), prohibited building large ships of over 500 koku, and reiterated castle and marriage approvals. Confucian officials such as Hayashi Razan participated in polishing the text, shifting the ordinance from moral admonition to checkable administrative obligations, a key step in legalizing the han-shogunate system.
3. 1663–1716Edo · EdoShogun Tokugawa Ietsuna in Kanbun 3 and Tsunayoshi in Tenpō 3, among others, reaffirmed the ordinance upon taking office, with clauses occasionally added or removed. Under the sixth shogun Ienobu, Arai Hakuseki revised it as the Shōtoku ordinance, which the eighth shogun Yoshimune abolished, declaring the Tenpō ordinance the permanent standard. Repeated reissues led daimyo to view the law as a ceremonial confirmation of shogunal authority, keeping clauses on one castle per domain, sankin-kotai, and frugality in force for a long time.
4. 1862–1868Edo · EdoIn Bunkyu 2 the shogunate greatly reduced sankin-kotai to ease finances and appease powerful domains, hollowing out the ordinance's most binding clauses first. After the restoration of imperial rule and abolition of the domains in Keiō 4/Meiji 1, the Buke shohatto, premised on the shogun–daimyo relationship, entirely lost its legal basis and became a historical document.