Do this now
Follow these steps in order.
- 01
Treat earthquake preparation as a normal travel precaution, not a reason to panic.
- 02
Learn the difference between magnitude and JMA seismic intensity before reading alerts.
- 03
Check the hotel's evacuation route and whether your location is coastal, beside a river or below a steep slope.
- 04
Keep official alerts available and reassess only when the affected area, intensity and local instructions are known.
What to know
Why earthquakes happen so often
The Japanese islands sit in a complex plate-boundary region. Stress builds where oceanic and continental plates interact and is released by earthquakes along plate boundaries or faults within the crust. This setting is why Japan maintains dense observation and warning systems.
What to know
A small tremor is not automatically an emergency
JMA reports the magnitude, epicenter and observed seismic intensity after an earthquake. Many events are not felt. Others may produce a brief shake in one prefecture without affecting another city. Check the intensity recorded where you are, then check transport and facility information.
What to know
Magnitude and seismic intensity answer different questions
Magnitude is a measure of the earthquake's size. JMA seismic intensity is the strength of shaking observed at a particular location, so it varies with distance, depth and local ground conditions. One earthquake can produce different intensity readings across Japan.
What to know
What Japan's preparedness changes—and what it does not
Earthquake-resistant construction, automatic train controls, early warnings and practiced staff procedures reduce risk. They do not make every building, hillside, coast or transport service equally safe. Local instructions and the condition directly around you remain decisive.
If that does not work
Use the fallback.
- If social media posts conflict, use JMA earthquake information and the affected operator or municipality.
- If you felt no shaking but receive a tsunami or evacuation instruction, follow the instruction for your current area.
- If you are unsure whether a trip can continue, confirm the exact destination and transport route rather than treating all of Japan as affected.
Before you need it
Save this offline.
- JMA seismic intensity scale
- Current accommodation address
- Coastal or inland status of the day's route
- Basic earthquake action card
Primary evidence
Official sources used
Open these pages again before travel. External links lead to the responsible Japanese authority or transport organization.
