1920 in Japan

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See also:Other events of 1920
History of Japan  • Timeline  • Years

Events in the year 1920 in Japan. It corresponds to Taishō 9 (大正9年) in the Japanese calendar.



  • January 10 – Japan is a founding member of the League of Nations.
  • February 1 – Japanese sugar plantation workers in Hawaii officially join a strike led by Filipinos and Hispanic workers.
  • February 24 – Nikolayevsk Incident: Realizing that he is outnumbered and far from reinforcement, the commander of the Japanese garrison allowed Yakov Triapitsyn's troops to enter the town of Nikolayevsk-on-Amur under a flag of truce.[2]
  • May 10 – In the general election, the Rikken Seiyūkai, led by Prime Minister Hara Takashi, increases on its majority of seats in the lower house of the Diet.[3]
  • June - About 450 Japanese civilians and 350 Japanese soldiers, along with Russian White Army supporters, are massacred by partisan forces associated with the Red Army at Nikolayevsk on the Amur River.
  • September 17 – The Victory Medal, a commemorative military medal of Japan awarded to mark service during the First World War, is established by Imperial Edict.
  • October 21 – The Battle of Qingshanli begins between the Imperial Japanese Army and Korean armed groups in a densely wooded region of eastern Manchuria called Qīngshānlǐ.[4]
  • date unknown
    • The literary magazine Teikoku Bungaku is published for the last time.
    • The Guards Cavalry Regiment, Guards Field Artillery Regiment, Guards Engineer Battalion, Guards Transport Battalion, plus other Guards service units are added to the Japanese Imperial Guard.




  1. ^ "Taishō | emperor of Japan". Encyclopedia Britannica. Retrieved 27 March 2019.
  2. ^ Gutman, Anatoly. Ella Lury Wiswell (trans.); Richard A. Pierce (ed.) The Destruction of Nikolaevsk-on-Amur, An Episode in the Russian Civil War in the Far East, 1920. Limestone Press (1993). ISBN 0-919642-35-7
  3. ^ Najita, Tetsuo: Hara Kei in the Politics of Compromise 1905–1915. Harvard Univ. Press, 1967.
  4. ^ Sasaki Harutaka (佐々木春隆): Kankoku dokuritsu undōshi jō no "Seizanri taisen" kō (韓国独立運動史上の「青山里大戦」考), Gunji shigaku (軍事史学), Vol.15 No. 3, pp. 22–34, 1979.
  5. ^ "Chronological List of the Mayors of Hiroshima City" Hiroshima Municipality