Kinmon incident

Kinmon incident
Part of Bakumatsu conflicts

An 1893 woodblock print by Yūzan Mori, depicting the Hamaguri rebellion.
Date20 August 1864
Result Shogunal victory
Chōshū Domain
Sonnō Jōi Rōnin force
Tokugawa shogunate
Aizu Domain
Satsuma Domain
Mito Domain
Owari Domain
Kii Domain
Kuwana Domain
Ōgaki Domain
Echizen Domain
Hikone Domain
Yodo Domain
Asao Domain
Commanders and leaders
Tokugawa Yoshinobu
3,000 men (1,400 Chōshū army + 1,600 Rōnin force) 50,000 men
Casualties and losses
400 killed or wounded 60 killed or wounded,
28,000 houses burnt down

The Kinmon incident (禁門の変 Kinmon no Hen, "Forbidden Gate Incident" or "Imperial Palace Gate Incident"), and is also known as, the Hamaguri Gate Rebellion (蛤御門の変 Hamaguri Gomon no Hen "Hamaguri Imperial Gate Incident") was a rebellion against the Tokugawa Shogunate that took place on August 20, 1864, at the Imperial Palace in Kyoto. The rebellion reflected the widespread discontent felt among both pro-imperial and anti-foreigner groups, who rebelled under the sonnō jōi slogan. The Sonnō Jōi, had been promulgated by the Emperor Kōmei as an "Order to expel barbarians." Thus, in March 1863, the rebels sought to take control of the Emperor, in order to restore the Imperial household to its position of political supremacy.

During what was a bloody crushing of the rebellion, it was the leading Chōshū clan that was held responsible for its instigation. To counter the rebel's kidnapping attempt, the Aizu and Satsuma domains led the defense of the Imperial palace. However, during the attempt, the rebels put Kyoto to fire, starting with the residence of the Takatsukasa family, and that of an Choshu official. It is unknown if the rebels set fire to Kyoto, as soon as they began to lose, or if their doing so, was part of their original strategy, and done as a diversionary tactic.

Various courtiers, including Nakayama Tadayasu, the Emperor's Special Consultant for National Affairs, were banished from Court, as a result of their involvement in this incident.[1] The Shogunate followed the incident with a retaliatory armed expedition, the First Chōshū expedition, in September 1864.


  1. Takeda Hideaki, Nakayama Tadayasu (1809-88) at, accessed 24 September 2013

Coordinates: 35°01′23.24″N 135°45′34.47″E / 35.0231222°N 135.7595750°E / 35.0231222; 135.7595750

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