Tokyo's Earthquake Risk: The Honest Answer
Tokyo is not earthquake-safe. Japan's Meteorological Agency estimates a 70% probability of a magnitude 7+ earthquake striking the Kanto region within 30 years. A Tokyo metropolitan earthquake would be catastrophic—potentially affecting 37 million people in the greater Tokyo area.
Historical Context
The 1923 Great Kanto Earthquake (magnitude 7.9) killed approximately 105,000 people in Tokyo, with widespread destruction from both shaking and subsequent fires. Historical patterns suggest earthquakes of this magnitude recur every 100-150 years. More than 100 years have passed since 1923, placing Tokyo in a heightened risk window.
Modern Resilience and Preparation
Tokyo has invested heavily in earthquake resilience since 1923. Modern building codes mandate seismic design, the early earthquake warning system provides seconds of advance notice, and extensive evacuation infrastructure exists. While Tokyo remains at significant earthquake risk, modern engineering and preparedness significantly reduce potential casualties compared to historical events.