depicting
samurai under a
sonnō jōi banner during the 1864
Mito Rebellion With the increasing number of incursions of foreign ships into Japanese waters in the late 18th and early 19th century, the
sakoku ("national seclusion") policy came increasingly into question. The
jōi "expel the barbarians" portion of
sonnō jōi, changed into a reaction against the
Convention of Kanagawa of 1854, which opened Japan to foreign trade. Under military threat from
United States Navy Commodore Matthew C. Perry's so-called "
black ships", the treaty was signed under duress and was vehemently opposed in
samurai quarters. The fact that the Tokugawa Shogunate was powerless against the foreigners despite the will expressed by the Imperial court was taken as evidence by
Yoshida Shōin and other anti-Tokugawa leaders that the
sonnō (revere the Emperor) portion of the philosophy was not working, and that the Shogunate must be replaced by a government more able to show its loyalty to the Emperor by enforcing the Emperor’s will. The philosophy was thus adopted as a battle cry of the rebellious regions of
Chōshū Domain and
Satsuma Province. The Imperial court in
Kyoto sympathized with the movement.
Emperor Kōmei personally agreed with such sentiments, and – breaking with centuries of imperial tradition – personally began to take an active role in matters of state: as opportunities arose, he fulminated against the treaties and attempted to interfere in the shogunal succession. His efforts culminated in March 1863 with his "
Order to Expel Barbarians" (). Although the Shogunate had no intention of enforcing the order, it nevertheless inspired attacks against the Shogunate itself and against foreigners in Japan, the most notable incident being the killing of the trader
Charles Lennox Richardson during the
Namamugi Incident. Other attacks included the shelling of foreign shipping in
Shimonoseki.
Rōnins (masterless samurai) also rallied to the cause, assassinating Shogunate officials and Westerners. This turned out to be the zenith of the
sonnō jōi movement, since the
Western powers responded by demanding
reparations for the assassinations and other acts by samurai against Western interests. In 1864, four Western nations launched a campaign against Shimonoseki, overrunning the meager defences and briefly occupying the region. While this incident showed that Japan was no match for Western military powers, it also served to further weaken the Shogunate, permitting the rebel provinces to ally and overthrow it, bringing about the
Meiji Restoration. The slogan itself was never actually a government or rebel policy; for all its rhetoric, Satsuma in particular had close ties with the West, purchasing guns, artillery, ships and other technology. ==Legacy==