the third dynasty of shoguns, or military rulers of feudal Japan, which ruled from 1603 to 1867; founded by Tokugawa Ieyasu. The Tokugawa rulers, as part of their efforts to secure government by the nobility, instituted a series of basic reforms. These included the establishment of a system by which the rights and duties of estates were strictly regulated, as well as the attachment of peasants to the land, a restriction on the development of merchant’s and usurer’s capital, and the imposition of strict political control over Japan’s princes. Seeking to preserve feudal institutions and to prevent foreign encroachments, whether military or other, the Tokugawa government introduced during the 1630’s a policy of national isolation.
Beginning in the late 18th century, however, the Tokugawa state entered a prolonged period of change caused by the continuing disintegration of Japan’s feudal structure. The change was accelerated by the arrival in 1853 of a squadron of American warships under the command of Commodore M. Perry. The USA, together with the European powers, compelled the shogunate to end its policy of isolation by imposing on Japan the unequal Ansei treaties, concluded between 1854 and 1858. As a consequence of the incomplete bourgeois revolution of 1867–68, the Tokugawa shogunate was overthrown. A government of the landlord-bourgeois bloc thereupon acceded to power (seeMEUI RESTORATION).