The Shochu Incident | Why did Emperor Go-Daigo's first plan to overthrow the shogunate fail?
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The theme this time is the Shochu Incident and Emperor Go-Daigo's first plan to overthrow the shogunate.
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Chapter 1: Why did Emperor Go-Daigo decide to overthrow the shogunate? The rule of the Kamakura Shogunate and the plight of the Emperor
The key to understanding the Shochu Incident (1324) lies in the power structure of the time. Since Minamoto no Yoritomo established the Kamakura Shogunate in 1192, the warrior government held actual sovereignty, and the Imperial Court, even while in Kyoto, had lost its real political power. The shogunate controlled core authorities such as land management, taxation, and judicial proceedings, while the Imperial Court remained merely a center for ritual and culture.
The Imperial Court side was defeated in the Jokyu War of 1221. Thereafter, the Rokuhara Tandai was established in Kyoto, and the movements of the Imperial Court were constantly monitored. This "normalization of surveillance" meant structural lack of freedom for the Emperor.
Emperor Go-Daigo, who ascended the throne in 1318, was originally seen as a "stopgap" figure. This was because the imperial succession was based on a rotation system between the Daikakuji-to and Jimyoin-to lines, and he was expected to abdicate to his nephew (the son of Emperor Go-Nijo). However, Go-Daigo was a man of high learning and ambition, and he strongly held the ideal of "direct imperial rule," symbolized by the Engi and Tenryaku eras.
In 1321, he suspended the cloistered government and began direct rule. Although he was actively involved in judicial rulings and government affairs, the existence of the shogunate, which held military and financial power, stood as a wall. To "substantiate" his direct rule, the influence of the shogunate had to be eliminated—such urgent calculations pushed his desire to overthrow the shogunate into a realistic political agenda.
The times also pushed him forward. After the Mongol invasions, dissatisfaction among the gokenin (shogunate vassals) accumulated due to insufficient rewards, and the tyranny of the Hojo Tokuso family also invited backlash. The activities of warrior groups called "akuto" increased in various places, and the fraying of order began to appear. Go-Daigo read this as the "seeds of victory" and began to move toward secret preparations.
Chapter 2: The plan for the Shochu Incident and its exposure! The anecdote of betrayal told in war chronicles
The overthrow of the shogunate could not be achieved by the Emperor alone. Court nobles who resonated with his ideals gathered around Go-Daigo, and Hino Suketomo and Hino Toshimoto in particular played central roles. Suketomo served as the brains for policy, while Toshimoto acted as the driving force for action, working hard on networking.
The plan took concrete shape around the spring of 1324. Taking advantage of the Kitano Festival in Kyoto, warriors such as Tajimi Kuninaga would launch a surprise attack on the Rokuhara Tandai. They would also mobilize warrior monks from Mount Hiei and Kofuku-ji Temple to seize key locations around Kyoto, and secure the bridges at Uji and Seta to block the shogunate army from the eastern provinces—this was the basic line. It was a royal road plan to seize the Kyoto-Kinai region by leveraging the authority and military power of religious forces.
However, the plan was exposed from an unexpected place. The war chronicle "Taiheiki" records that Toki Yorikazu leaked it to his wife, and it was discovered after being passed on to her father, Saito Toshiyuki (it was Toki Yorikane and Tajimi Kuninaga who were defeated in the actual battle). Although there are differing theories in historical materials regarding the details, the general outline of a collapse due to "betrayal and whistleblowing" is consistent across various records.
On September 19, the Rokuhara launched a lightning-fast surprise attack on the Tajimi residence. Caught off guard, the Tajimi side fought hard but were defeated and killed, and the core of the armed uprising collapsed in an instant. Thereafter, the identification and interrogation of those involved proceeded in a chain reaction, and eventually, Go-Daigo's name surfaced as the "mastermind."
The exposure just before the plan was set in motion revealed the vulnerability of the anti-shogunate side's "communication and secrecy." To unite religious forces and warrior groups, careful information control and a multi-layered communication network were essential, but the fact that their construction was incomplete determined the failure of the initial battle.
Chapter 3: The response of the Rokuhara Tandai and Emperor Go-Daigo's skillful defense
The Rokuhara Tandai (Hojo Norisada and others) proceeded with military suppression and judicial procedures simultaneously. As long as the case involved the "Emperor," hasty punishment would only spread backlash against the shogunate nationwide. From here on, it was a tug-of-war between military force and political strategy.
The shogunate proceeded with the summons and interrogation of Suketomo, Toshimoto, and others, building up layers of testimony. Although testimonies suggesting the Emperor's involvement were gathering, the Kamakura government was well aware of the risks of "punishing the Emperor." Although they had the experience of forcing the Imperial Court to submit in the Jokyu War, this time it was only at the planning stage and was an attempted crime. There was little justification for pointing a blade directly at symbolic power.
Here, Go-Daigo dispatched Madenokoji Nobufusa as an imperial envoy to offer an explanation. The focus was on three points—that the Emperor himself had not taken up arms, that it had been suppressed before any actual damage occurred, and the magnitude of the negative impact that punishment would have on national order. The shogunate side could not ignore this either, and they sought a political compromise.
The conclusion was a political decision that the Emperor himself would not be held accountable. By concentrating responsibility on the execution team and close attendants while keeping the system and authority in balance, the Rokuhara and Kamakura authorities chose to contain the incident. Go-Daigo narrowly escaped disaster and held onto hope for a future comeback.
Chapter 4: The Fate of the Punished Close Attendants and Emperor Go-Daigo's Next Challenge
The leniency extended only to the Emperor's personal safety. In October 1324, Suketomo and Toshimoto were escorted to Kamakura. After interrogation, Suketomo was exiled to Sado in 1325, while Toshimoto was pardoned and returned to the capital. For an elite court noble, exile to a remote island was harsh, and Suketomo ended his life in exile eight years later in 1332.
Meanwhile, the warriors like Kuninaga Tajimi who were struck down in the Kyoto region met their end on the battlefield, and the Toki clan was also shaken. The line drawn for punishment was a compromise between 'making an example without shaking the political structure' and 'closing the case,' revealing the rational nature of the Shogunate's governance.
However, Go-Daigo's fire did not go out. He installed his first son, Prince Morinaga, as the head of the Tendai sect, strengthening ties with religious forces. He personally visited Mount Hiei and the southern capital to secure the support of warrior monks, rebuilding the two pillars of military power and authority. While feigning submission on the surface, he continued preparations for the second round behind the scenes.
In 1331, the Genkō War broke out. Initially, it was exposed and defeated once again, and Go-Daigo was exiled to Oki. Toshimoto was also re-arrested and executed at Kuzuharaoka in 1332. Despite the painful sacrifices, the fire of anti-Shogunate sentiment continued to spread across the country.
Chapter 5: From the Shōchū Incident to the Genkō War! The Path to the Fall of the Kamakura Shogunate
The historical significance of the Shōchū Incident lies in the fact that it became public knowledge that the Emperor himself had intended to overthrow the Shogunate. This provided a powerful cause for warriors and religious institutions dissatisfied with the Shogunate. The legitimacy of 'resisting under the Emperor's banner' became an ideological and emotional backbone.
After the incident, disobedience increased in various regions, and order was gradually eroded. Go-Daigo also learned from his failure, reinforcing three points: information control, military foundations, and regional cooperation. During the Genkō War, figures like Masashige Kusunoki and Yoshisada Nitta emerged as key players. In 1333, the defection of Takauji Ashikaga became the decisive blow, leading to the fall of Rokuhara, followed by the Nitta army's capture of Kamakura and the destruction of the Hōjō clan.
Go-Daigo returned to Kyoto and began the Kenmu Restoration. His long-cherished dream of direct imperial rule became a reality. Just nine years after the Shōchū Incident, his initial goal seemed to have been achieved. However, discrepancies between the courtly order and the expectations of the warrior society created friction, eventually leading to Takauji's defection and the establishment of the Muromachi Shogunate. The long period of warfare known as the Northern and Southern Courts split began.
Looking back, the Shōchū Incident was both 'the first step that ended in failure' and 'the starting point that significantly transformed the era.' The exposure and suppression, which seemed like a small tear, visualized the deep cracks running through the foundation of governance and prepared for the next wave (the Genkō War). History often moves through the accumulation of failed attempts and setbacks—the Shōchū Incident can be said to be a typical example of this.
※ This article is a summary based on research conducted as a hobby, utilizing AI tools and other resources.