Kamakura Shogunate in Japan

In 1185, Minamoto no Yoritomo's forces destroyed the Taira clan, and Yoritomo began building a new kind of government at Kamakura, in eastern Japan. Over the following years it grew into the Kamakura shogunate, the first warrior-led regime to hold real power in the country. Although the emperor and court in Kyoto continued to exist, authority increasingly rested with military men, and the samurai would remain the dominant political class until the Meiji Restoration of 1868, about seven centuries later.

The background lay in the decline of the Heian court's ability to keep order. As the aristocracy at Kyoto became absorbed in ceremony and factional rivalry, provincial landholders relied on armed retainers to protect their estates. Two warrior houses, the Taira and the Minamoto, rose as powerful patrons of such forces. The Taira, led by Taira no Kiyomori, gained dominance in Kyoto in the 1160s and placed their relatives close to the throne, but their grip provoked resentment. In 1180 a prince's call to arms set off the Genpei War, in which Yoritomo, a Minamoto survivor exiled in eastern Japan, rallied warriors behind him.

The war ended at the naval Battle of Dan-no-ura in 1185, where the Taira were defeated and the child emperor Antoku died. Yoritomo, who directed the campaign largely from Kamakura while his half-brother Minamoto no Yoshitsune led the fighting, then moved to secure his position. He fell out with Yoshitsune, who was eventually hunted down and killed. In the same year Yoritomo won the court's permission to appoint military governors (shugo) and estate stewards (jito) in the provinces, giving him a network of loyal men across the country. He received the title of shogun in 1192, though historians note that his authority had effectively been established earlier.

The system rested on personal bonds: warriors who became vassals of the shogun, known as gokenin, received protection and confirmation of their lands in return for service. A administrative apparatus in Kamakura handled military affairs, land disputes and justice. After Yoritomo's death in 1199, power passed to the Hojo family, who ruled as regents on behalf of the shoguns. In 1221 they crushed an attempt by Retired Emperor Go-Toba to restore court power, and in 1232 the regime issued the Goseibai Shikimoku, a law code for warrior society.

The shogunate also withstood the Mongol invasions of 1274 and 1281, though the costs of defense, with little new land to reward warriors, strained its finances and loyalty. It fell in 1333 when Emperor Go-Daigo's supporters and disaffected warriors overthrew it. Its model of dual government, with an emperor as symbolic sovereign and a shogun as practical ruler, shaped Japanese politics for centuries.