The Great Kantō Earthquake (Japanese: 関東大地震, Kantō daijishin, or 関東大震災, Kantō daishinsai) was a megathrust earthquake that struck the Kantō Plain on the main Japanese island of Honshu at 11:58:32 JST (02:58:32 UTC) on Saturday, 1 September 1923.
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The 104th anniversary falls on September 1, 2027.