Tsuyama massacre

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Tsuyama massacre
The aftermath of the Tsuyama massacre
Location	Kamo, Tsuyama, Okayama Prefecture, Empire of Japan
Coordinates	35°14′52.8″N 134°02′22.2″E / 35.248000°N 134.039500°E / 35.248000; 134.039500
Date	21 May 1938 (1938-05-21) 1:30 a.m. – 3:00 a.m.
Target	Villagers
Attack type	Mass murder, murder-suicide
Weapons	Remington M11 shotgun, Japanese sword, axe
Deaths	31 (including the perpetrator and the perpetrator's grandmother)
Injured	3
Perpetrator	Mutsuo Toi
Motive	Revenge for sexual and social rejection

The Tsuyama massacre (津山事件, Tsuyama jiken) was a revenge spree killing that occurred on the night of 21 May 1938 in the rural village of Kamo close to Tsuyama in Okayama, Empire of Japan. Mutsuo Toi (都井 睦雄, Toi Mutsuo), a 21-year-old man, killed 30 people,^[1] including his grandmother, with a Browning shotgun, katana, and axe, and seriously injured three others before killing himself with the shotgun. It is the deadliest shooting by a lone gunman in Japanese history.