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Kamakura period

Period of Japanese history from CE 1185 to 1333

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There are various theories as to the year in which the Kamakura period and Kamakura shogunate began. In the past, the most popular theory was that the year was 1192, when Minamoto no Yoritomo was appointed Seii Taishōgun (征夷大将軍). Later, the prevailing theory was that the year was 1185, when Yoritomo established the Shugo (守護), which controlled military and police power in various regions, and the Jitō (地頭), which was in charge of tax collection and land administration. Japanese history textbooks as of 2016 do not specify a specific year for the beginning of the Kamakura period, as there are various theories about the year the Kamakura shogunate was established.

During the early Kamakura period, the shogunate continued warfare against the Northern Fujiwara which was only defeated in 1189. Then, the authority of the Kamakura rulers waned in the 1190s and power was transferred to the powerful Hōjō clan in the early 13th century with the head of the clan as regent (Shikken) under the shogun which became a powerless figurehead. The later Kamakura period saw the invasions of the Mongols in 1274 and again in 1281. To reduce the amount of chaos, the Hōjō rulers decided to decentralize power by allowing two imperial lines – Northern and Southern court, to alternate the throne. In the 1330s, the Southern court under Emperor Go-Daigo revolted and eventually led to the Siege of Kamakura in 1333 which ended the rule of the shogunate. With this, the Kamakura period ended. There was a short re-establishment (1333–1336) of imperial rule under Go-Daigo assisted by Ashikaga Takauji and Nitta Yoshisada but would later lead to direct rule under Ashikaga, forming the Ashikaga shogunate in the succeeding Muromachi period.

Several significant administrative achievements were made during the Hōjō regency. These provided the opportunities for other military lords to exercise judicial and legislative authority and the government established a council centered around collective leadership. The period saw the adoption of Japan's first military code of law in 1232. There was an expansion of Buddhist teachings into Old Buddhism (Kyū Bukkyō) and New Buddhism (Shin Bukkyō).

Shogunate and Hōjō regency

The Kamakura period marked Japan's transition to a land-based economy and the concentration of advanced military technologies in the hands of a specialized fighting class. Lords required the loyal services of vassals, who were rewarded with fiefs of their own; the fief holders then exercised local military rule. Once Minamoto no Yoritomo had consolidated his power, he established a new government at his family home in Kamakura. He called his government a bakufu (幕府, tent government), but because he was given the ancient high military title Sei-i Taishōgun by Emperor Go-Toba, the government is often referred to in Western literature as the Shogunate. Yoritomo followed the Fujiwara form of house government and had an administrative board (政所, Mandokoro), a board of retainers (侍所, Samurai-dokoro), and a board of inquiry (問注所, Monchūjo). After confiscating estates in central and western Japan, he appointed stewards for the estates and constables for the provinces. As shōgun, Yoritomo was both the steward and the constable general.

The Kamakura shogunate was not a national regime, however, and although it controlled large tracts of land, there was strong resistance to the stewards. The regime continued warfare against the Northern Fujiwara, but never brought either the north or the west under complete military control. However, the fourth leader of the Northern Fujiwara Fujiwara no Yasuhira was defeated by Yoritomo in 1189, and the 100-year-long prosperity of the north disappeared. The old court resided in Kyoto, continuing to hold the land over which it had jurisdiction, while newly organized military families were attracted to Kamakura.

Despite a strong beginning, Yoritomo failed to consolidate the leadership of his family on a lasting basis. Intrafamily contention had long existed within the Minamoto, although Yoritomo had eliminated most serious challengers to his authority. When he died suddenly in 1199, his son Minamoto no Yoriie became shōgun and nominal head of the Minamoto, but Yoriie was unable to control the other eastern warrior families. By the early 13th century, a regency had been established by Hōjō Tokimasa—a member of the Hōjō clan, a branch of the Taira that had allied itself with the Minamoto in 1180. The head of Hōjō was installed as a regent for the shōgun; the regent was termed the Shikken during the period, although later positions were created with similar power such as the Tokusō and the Rensho. Often the Shikken was also the Tokusō and Rensho. Under the Hōjō, the shōgun became a powerless figurehead.

With the protection of the Emperor, a figurehead himself, strains emerged between Kyoto and Kamakura, and in 1221 the Jōkyū War broke out between the cloistered Emperor Go-Toba and the second regent Hōjō Yoshitoki. The Hōjō forces easily won the war, and the imperial court was brought under the direct control of the shogunate. The shōgun's constables gained greater civil powers, and the court was obliged to seek Kamakura's approval for all of its actions. Although deprived of political power, the court retained extensive estates.

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 within the Kamakura regime. 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 parts of it 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 clan, 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.

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