The Hojo reacted to the ensuing chaos by trying to place more power among the various great family clans. To further weaken the Kyoto court, the bakufu decided to allow two contending imperial lines--known as the Southern Court or junior line and the Northern Court or senior line--to alternate on the throne. The method worked for several successions until a member of the Southern Court ascended to the throne as Emperor Go-Daigo (r. 1318- 39). Go-Daigo wanted to overthrow the bakufu, and he openly defied Kamakura by naming his own son his heir. In 1331 the bakufu exiled Go-Daigo, but loyalist forces rebelled. They were aided by Ashikaga Takauji (1305-58), a constable who turned against Kamakura when dispatched to put down Go-Daigo's rebellion. At the same time, another eastern chieftain rebelled against the bakufu, which quickly disintegrated, and the Hojo were defeated.

In the swell of victory, Go-Daigo endeavored to restore imperial authority and tenth-century Confucian practices. This period of reform, known as the Kemmu Restoration (1333-36), aimed at strengthening the position of the emperor and reasserting the primacy of the court nobles over the bushi. The reality, however, was that the forces who had arisen against Kamakura had been set on defeating the Hojo, not on supporting the emperor. Ashikaga Takauji finally sided with the Northern Court in a civil war against the Southern Court represented by Go-Daigo. The long War Between the Courts lasted from 1336 to 1392. Early in the conflict, Go-Daigo was driven from Kyoto, and the Northern Court contender was installed by Ashikaga, who became the new shogun.

Data as of January 1994