The Great Kanto earthquake devastated Tokyo and Yokohama
On this day · 1 September 1923
A noon earthquake toppled two cities in 1923, but it was the firestorms that killed most of the dead.
At 11:58 a.m. on September 1, 1923, a magnitude 7.9 earthquake ruptured beneath Japan’s Kanto region, flattening much of Tokyo and Yokohama. The timing was cruel: it struck as families lit stoves to cook lunch.
The shaking collapsed buildings, but the real killer was fire. Overturned cooking flames, fanned by strong winds, merged into firestorms that swept the wooden cities. Most victims died not in the quake itself but in the blazes and chaos that followed.
Government records put the death toll at about 105,385, among history’s most destructive earthquakes.
More than a million people were left homeless. The disaster was so total that some officials argued for moving the capital altogether. Out of the ruins came stricter building codes and a national day of disaster preparedness, observed every September 1 since.
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