The Basics
The nationwide emergency phone numbers are:
| Emergency Call to Police: | 110 |
| Fire, Ambulance or Emergency Rescue: | 119 |
You can read more here about earthquakes and typhoons.
What to do in a Medical Emergency in Japan
Here is a useful page: Medical Emergencies in Japan: How to Communicate in Japanese
Emergency Preparedness for US Citizens in Japan
You can find good information here about how to prepare for potential emergencies in Japan.
They also provide information about a Safety Tips app, supplied by the Japan Tourism Agency: