The Hōjō were an offshoot of the Minamoto's arch-enemy, the Taira of the Kammu branch, originating in Izu Province. They gained power by supporting the extermination of the Taira by intermarrying with and supporting Minamoto no Yoritomo in the Battle of Dan-no-ura. Just 18 years after, the Hōjō usurped power with Yoritomo's death.
Rise to power
helped Minamoto no Yoritomo, a son-in-law, defeat the forces of the Taira to become Japan's first shōgun. Hōjō Masako, Tokimasa's daughter, was married to Yoritomo. After the death of Yoritomo, Tokimasa became shikken to the child shōgun, thus effectively transferring control of the shogunate to his clan permanently. The Minamoto and even Imperial Princes became puppets and hostages of the Hōjō.
Major early events
The Imperial court at Kyoto resented the decline in its authority during the Kamakura shogunate, and in 1221 the Jōkyū War broke out between retired Emperor Go-Toba and the second regentHōjō Yoshitoki. The Hōjō forces easily won the war, and the imperial court was brought under the direct control of the shogunate. The shōguns constables gained greater civil powers, and the court was obliged to seek the shōguns approval for all of its actions. Although deprived of political power, the court retained extensive estates in Kyoto. Several significant administrative achievements were made during the Hōjō regency. In 1225 the third regent Hōjō Yasutoki established the Council of State, providing opportunities for other military lords to exercise judicial and legislative authority at Kamakura. The Hōjō regent presided over the council, which was a successful form of collective leadership. The adoption of Japan's first military code of law—the Goseibai Shikimoku—in 1232 reflected the profound transition from court to militarized society. While legal practices in Kyoto were still based on 500-year-old Confucian principles, the new code was a highly legalistic document that stressed the duties of stewards and constables, provided means for settling land disputes, and established rules governing inheritances. It was clear and concise, stipulated punishments for violators of its conditions, and remained in effect for the next 635 years. As might be expected, the literature of the time reflected the unsettled nature of the period. The Hōjōki describes the turmoil of the period in terms of the Buddhist concepts of impermanence and the vanity of human projects. The Heike monogatari narrated the rise and fall of the Taira, replete with tales of wars and samurai deeds. A second literary mainstream was the continuation of anthologies of poetry in the Shin Kokin Wakashū, of which twenty volumes were produced between 1201 and 1205.
