TheToranomon incident (虎ノ門事件, Toranomon Jiken) was an assassination attempt on the Prince Regent Hirohito of Japan on 27 December 1923 by communist agitator Daisuke Nanba.
The incident took place at the Toranomon intersection between the Akasaka Palace and the Diet of Japan in downtown Tokyo, Japan. Crown Prince and Regent Hirohito was on his way to the opening of the 48th Session of the Imperial Diet when the young son of a member of the Diet, Daisuke Nanba, fired a small pistol at his carriage. The bullet shattered a window on the carriage, injuring a chamberlain, but Hirohito was unharmed.Nanba's attempt was motivated partly by his leftist ideology, and also by a strong desire to avenge the death of Shūsui Kōtoku, who had been executed for his alleged role in the High Treason Incident of 1910.
Although Nanba claimed that he was rational (a view agreed upon in the court records), he was proclaimed insane to the public, sentenced to death on 13 November 1924, and executed two days later.
Prime Minister Yamamoto Gonnohyōe took responsibility for the lapse in security and resigned along with his cabinet and a number of other high officials.He was replaced by the even more conservative Kiyoura Keigo and a cabinet made up entirely of members of the House of Peers not associated with any political party. The Toranomon Incident was cited later by the government as one of the justifications for the Peace Preservation Law of 1925.
Hirohito was the 124th emperor of Japan according to the traditional order of succession, ruling over the Empire of Japan from 25 December 1926 until 2 May 1947, after which he was Emperor of the state of Japan until his death. He was succeeded by his fifth child and eldest son, Akihito. Hirohito and his wife, Empress Kōjun, had seven children, two sons and five daughters. In Japan, reigning emperors are known only as "the Emperor." He is now referred to primarily by his posthumous name, Shōwa (昭和), which is the name of the era coinciding with his reign; for this reason, he is also known as the Shōwa Emperor or Emperor Shōwa. By 1979, Hirohito was the only monarch in the world with the title "emperor." Hirohito was the longest-lived and longest-reigning historical Japanese emperor and one of the longest-reigning monarchs in the world.
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Daisuke Nanba was a Japanese student who tried to assassinate the Prince Regent Hirohito in the Toranomon Incident on December 27, 1923.
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Toranomon (虎ノ門) is a business district of Minato, Tokyo.
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Events in the year 1923 in Japan. It corresponds to Taishō 12 (大正12年) in the Japanese calendar.
During the 1920s and 1930s, there were three known assassination attempts on Hirohito, the Emperor of Japan. The assailants were all either Korean or Japanese. Assassination attempts on Hirohito took place throughout his reign as Prince regent, and Emperor of Japan. All of their attempts failed. All four would-be assassins were sentenced to death, though one was granted amnesty and eventually released, and one committed suicide in prison.