List of massacres in Japan

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The following is a list of massacres that have occurred in Japan:

Date Name Location Perpetrator Deaths Notes
12–15 April 1638 Mass beheadings at the final days of the Shimabara revolt inside and around Hara Castle, Minamishimabara Shogunate army 37,000 Rebels and sympathizers were beheaded by military forces. Afterwards, the Hara Castle was also burned to the ground.
December 1696 Yoshiwara spree killing Yoshiwara Sano Jirōzaemon ?
1 March 1919 March 1st demonstrations Korea under Japanese rule Imperial Japanese Army 7,509 15,849 Koreans wounded[citation needed]
October 1920 Gando massacre Jiandao Imperial Japanese Army 5,000+[1]
July 1922 Shinano River incident Shinano River Okura zaibatsu 100+ Documentation on death incomplete
September 1923 Kantō Massacre Kantō region police and vigilantes 6,000+ Multiple incidents
May 1938 Tsuyama massacre Tsuyama Mutsuo Toi 30 3 injured
July 1945 Hanaoka incident Ōdate Imperial Japanese Army 418 113 prisoners of war executed; 307 also died
6,9 August 1945 Atomic bombings of Hiroshima and Nagasaki Hiroshima and Nagasaki United States Army Air Forces 129,000–226,000 Bombing attacks by the Allied forces, specifically, the 509th Composite Group of the United States Army Air Forces . Two Nuclear weapons were dropped on the two respective cities of Hiroshima, and Nagasaki. Little Boy was detonated above Hiroshima at a height of 600 ± 15 m, at approximately 08:15 (JST), on 6 August, 1945. Fat Man was detonated at a height of 500m above Nagasaki at approximately 11:02 (JST), on 9 August, 1945. The original target for Fat Man's detonation was the city of Kokura; due to poor visibility, Nagasaki was the second chosen target.

The two bombings killed between 129,000 and 226,000 people. In Hiroshima, it is believed 20,000 soldiers were killed as well as 70,000–126,000 civilians. In Nagasaki, at least 150 soldiers, and 39,000–80,000 civilians were killed. Many deaths occurred within the months following the bombings, either as a result of traumatic injury, or radiation sickness. Japan subsequently surrendered to the Allies on 15 August, 1945, six days after the bombing of Nagasaki.

The bombing of Hiroshima, marked the second man-made nuclear explosion in history, after the Trinity Nuclear Test, on 16 July, 1945. The bombings remain the only use of nuclear weapons in armed conflict. Survivors of the Nuclear Attacks have been dubbed "Hibakusha"; translating literally to "person affected by a bomb".

26 January 1948 Teigin case Tokyo Sadamichi Hirasawa 12 False verdict suspected
15 July 1949 Mitaka incident Tokyo Keisuke Takeuchi 8 20 injured. False verdict suspected
30 August 1974 Mitsubishi bombing Tokyo East Asia Anti-Japan Armed Front 8 376 injured
4 November 1989 Sakamoto family murder Yokohama Aum Shinrikyo 3
27–28 June 1994 Matsumoto incident Matsumoto Aum Shinrikyo 8 500+ injured[2]
20 March 1995 Tokyo subway sarin attack Tokyo Aum Shinrikyo 13 6,252 injured
25 July 1998 Wakayama arsenic poison case Sonobe district of Wakayama, Wakayama Masumi Hayashi 4 64 injured[3]
29 September 1999 Shimonoseki Station massacre Shimonoseki Yasuaki Uwabe 5 10 injured
20 December 2000 Setagaya family murder Setagaya Unknown 4 Perpetrator never caught
8 June 2001 Osaka school massacre Ikeda Mamoru Takuma 8 15 injured
1 September 2001 Myojo 56 building fire Shinjuku Unknown 44 Perpetrator never caught
8 June 2008 Akihabara massacre Chiyoda Tomohiro Katō 7 10 injured
1 October 2008 Osaka Movie Theater fire[4] Osaka Kazuhiro Ogawa 16 Perpetrator's name never revealed to the public.[dubious ]
26 July 2016 Sagamihara stabbings Sagamihara Satoshi Uematsu 19 26 injured
6 October 2017 Hitachi City apartment arson[5] Ibaraki Hirobumi Komatsu 6
28 May 2019 Kawasaki stabbings Kawasaki Ryuichi Iwasaki[6] 3 16 injured
18 July 2019 Kyoto Animation arson attack Kyoto Shinji Aoba 36 33 injured[7]


  1. ^ Eckhardt Fuchs, Tokushi Kasahara, Sven Saaler (4 December 2017). A New Modern History of East Asia. p. 196. ISBN 978-3737007085. Retrieved 2018-03-03. The Japanese forces then carried out the Gando Massacre, in which they indiscriminately attacked Koreans living in Eastern Manchuria and other regions, killing over 5,000 and burning down more than 3,500 homes.CS1 maint: multiple names: authors list (link)
  2. ^ [1]
  3. ^ "Courts ignore reasonable doubt: lawyers". The Japan Times. 2006-11-16. Archived from the original on 2008-10-25. Retrieved 2008-02-04.
  4. ^ Fox News:Fire at Japanese Adult Video Theater Kills 15
  5. ^ Channel News Asia Five Children, Women dead in Japan 'arson attack':Reports
  6. ^ The Japan Times [2]
  7. ^ "Death toll from arson attack on Kyoto Animation studio rises to 36". Retrieved 2019-10-05.