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Nanboku-chō period

Period of Japanese history from 1336 to 1392

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Through Kyoto

The destruction of the Kamakura shogunate in 1333 and the failure of the Kenmu Restoration in 1336 opened up a legitimacy crisis for the new shogunate. Institutional changes in the estate system (shōen) that formed the bedrock of the income of nobles and warriors altered the status of the various social groups. The establishment of the Ashikaga shogunate broadened the economic base of the warriors, while undercutting the noble proprietors. However, this trend had started already with the Kamakura bakufu.

Background

During the early period, there existed a Northern Imperial Court, established by Ashikaga Takauji in Kyoto, and a Southern Imperial Court, established by Emperor Go-Daigo in Yoshino.

The main conflicts that contributed to the outbreak of the civil war between the courts were the growing conflict between the Hōjō clan and other warrior groups in the wake of the Mongol invasions of Japan of 1274 and 1281 and the failure of the Kenmu Restoration, which triggered the struggle between the supporters of the imperial loyalists and supporters of the Ashikaga clan.

Disaffection towards the Hōjō-led Kamakura regime appeared among the warriors towards the end of the 13th century. This resentment was caused by the growing influence of the Hōjō over other warrior families within the regime. The Mongol invasions were the main cause behind this centralization of power that took place during the regency of Hōjō Tokimune (1268–1284). During the crisis, three things occurred: Hōjō family appointments to the council of state increased; the Hōjō private family council became the most important decision making body; and direct vassals of the Hōjō were increasingly promoted to the shugo (governor) posts. This reduced the base of support to encompass Hōjō family members and their direct vassals.Note a When a coalition against the Hōjō emerged in 1331, it took only two years to topple the regime.

Since wealth in pre-industrial, agrarian societies is tied to land, land became the main reason for much discontent among the warrior class. Since the Kamakura period, victory in battle would be rewarded by land grants. Due to the nature of a foreign invasion, the victory against the Mongol invasions meant that there were no lands to hand out to the victors.

When the Kamakura bakufu was destroyed in 1333, the Kyoto court society emerged to confront the warrior class. In the transition from the Heian to the Kamakura period, the warriors were free from the domination of court patrimonialism. With the demise of the Kamakura, the imperial court attempted to restore its power in the Kenmu Restoration. Not until the Meiji Restoration of the 19th century did this occur again.

Kenmu Restoration: 1333–1336

In the spring of 1333, the Emperor Go-Daigo and his supporters planned to restore the glory of the imperial court. Emperor Daigo (AD 901–923), who lived at a time when the court had no strong rivals and effective rule was exercised directly from the throne, became Go-Daigo's adopted name and model. The Kenmu Restoration was a conscious movement to restore the imperial power vis-a-vis the warrior class. Two of the movement's greatest spokesmen were Prince Morinaga and Kitabatake Chikafusa. Prince Morinaga was Go-Daigo's son, and archrival to Ashikaga Takauji since he advocated the militarization of the nobles as a necessary step towards effective rule. Morinaga epitomized Chikafusa as the latter was a Kyoto noble who was also military general. During the long siege in Hitachi (1338–1343), Chikafusa wrote the Jinnō Shōtōki, an influential work on the legitimacy of the Japanese imperial system. This text would later become an ideological base of the Meiji Restoration in the 19th century.

However, the Kenmu Restoration failed due to Go-Daigo's desire to restore not only imperial power, but also its culture. He wrote a treatise (Kenmu Nenchū Gyōji) to revive court ceremonies that had fallen out of use. However, shortly thereafter, the samurai clans became increasingly disillusioned with the reestablished imperial court, which sought to return to the social and political systems of the Heian period. Sensing their discontent, Takauji pleaded with the emperor to do something before rebellion would break out, however his warnings were ignored. Hōjō Tokiyuki, son of Takatoki, took the opportunity to start the Nakasendai rebellion to try to reestablish the shogunate in Kamakura in 1335. Takauji put down the rebellion and took Kamakura for himself. Taking up the cause of his fellow samurai, he claimed the title of Sei-i Taishōgun and allotted land to his followers without permission from the court. Takauji announced his allegiance to the imperial court, but Emperor Go-Daigo sent Nitta Yoshisada to reclaim Kamakura. In 1336 Takauji rebelled against the imperial court and proclaimed the beginning of a new shogunate. He captured Kyoto for a few days in February 1336, only to be driven out and fled to Kyūshū due to the arrival of forces under Prince Takanaga, Prince Norinaga, Kitabatake Akiie and Yūki Munehiro, who attacked and defeated him near Kyoto. This betrayal of the Kenmu Restoration by Takauji blackened his name in later periods of Japanese history, and officially started the Nanboku-chō War. Earlier historiography taught the Restoration failed due to the ineffectiveness in rewarding lands to the samurai. However, it is now clear that the Restoration was effective in this respect. Therefore, Takauji's rebellion and desire to create a new warrior regime was a prime determinant in the Restoration's failure. His rebellion encouraged the warrior class who desired to see the creation of another military regime modeled after the Kamakura bakufu. After Takauji and his brother were forced to retreat to the west, he then allied himself with the clans native to Kyūshū. After defeating the Kikuchi clan at Hakata Bay in the Battle of Tatarahama (1336), Takauji was "virtually master of Kyushu". At the decisive Battle of Minatogawa in 1336, Takauji defeated Yoshisada again and killed Masashige, allowing him to seize Kyoto for good, beginning the turbulent period which saw two emperors fight each other and which would last for almost 60 years. When Ashikaga's army entered Kyōto, Emperor Go-Daigo resisted, fleeing to Mount Hiei, but seeking reconciliation, he sent the imperial regalia to the Ashikaga side. Takauji enthroned the Jimyōin-tō emperor, Kōmyō, and officially began his shogunate with the enactment of the Kenmu Law Code. Go-Daigo escaped from the capital in January 1337, the regalia that he had handed over to the Ashikaga being counterfeit, and set up the Southern Court among the mountains of Yoshino.

The Nanboku-chō War was an ideological struggle between loyalists who wanted the Emperor back in power, and those who believed in creating another military regime modeled after Kamakura. Chikafusa was pragmatic on the need for warriors to participate in the Restoration but a severe divergence between Chikafusa and Takauji polarized the leaders for many years. The failure of the Restoration led to the emergence of the Ashikaga shogunate.

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