Samurai forces loyal to Hojo Masako, Yoritomo’s widow and Sanetomo’s mother, quickly counter an uprising in Kyoto.

The samurai army marches to Heian and crushes the rebellion in 1221.

The emperor is banished, and the Hojos install two of their own as military governors in Kyoto, assume command of the court and the imperial succession, and confiscate the estates of the emperor’s adherents and distribute them among their own loyalists.

The result of this so-called Jokyu War is the entrenchment of the feudal system and the strengthening of control by the Japanese military establishment.