Kinmon Incident

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Kinmon Incident
Part of Bakumatsu conflicts
Hamaguri rebellion.jpg
An 1893 woodblock print by Yūzan Mori, depicting the Hamaguri rebellion.
Date August 20, 1864
Location Kyoto
Result Shogunal victory
Ichimonjimitsuboshi.svgChōshū Domain
Sonnō Jōi Rōnin force
Tokugawa family crest.svgTokugawa shogunate
Flag of Aizu domain.svgAizu Domain
Japanese Crest Simazu Jyumonnji.svgSatsuma Domain
Tokugawa family crest.svgMito Domain
Tokugawa family crest.svgOwari Domain
Tokugawa family crest.svgKii Domain
Kuwana Domain
Ōgaki Domain
Echizen Domain
Hikone Domain
Yodo Domain
Asao Domain
Flag of Shinsengumi.svgShinsengumi
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?, literally, "Forbidden Gate Incident" or "Imperial Palace Gate Incident"), 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. It reflected widespread discontent among pro-imperial and anti-foreigner groups, who rebelled under the Sonnō Jōi slogan. Sonnō Jōi had been promulgated by the Emperor Kōmei as the "Order to expel barbarians" in March 1863, and the rebels sought to take control of the Emperor to accomplish the restoration of the Imperial household to political supremacy.

During the bloody crushing of the rebellion, the leading Chōshū clan was held responsible for its instigation. To counter the kidnapping attempt, the Aizu and Satsuma domains led the defense of the Imperial palace, but during the incident, the rebels put Kyoto into fire, starting with the residence of the Takatsukasa family and the one of a Choshu official. It is not entirely clear if they did it as soon as they started to lose, or if it was part of their plan from the beginning, to act as a diversion.[citation needed]

Some courtiers, including Nakayama Tadayasu, the Emperor's Special Consultant for National Affairs, were banished from court because of their involvement in the 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