🐟 Jishin Sensei

Japan Earthquake Safety Quiz — Support

Jishin Sensei ("Earthquake Teacher") is an iOS app that turns Japan's earthquake wisdom into a fun daily habit. Every day, Namazu Sensei — the legendary catfish of Japanese earthquake folklore — asks you one real-life scenario question.

Contact / Report a problem

Found a bug, have a question, or want to suggest a feature? Please open an issue on GitHub — no account data is needed beyond a free GitHub login:

→ Open a support issue

FAQ

Is the app free?

Yes. The daily quiz and the Emergency tab are free forever. An optional one-time Supporter purchase unlocks the full question archive.

How do I restore my purchase on a new device?

Make sure you are signed in with the same Apple Account, then open Archive → Become a Supporter → Restore purchases. Purchases are tied to your Apple Account, so reinstalling the app never loses them.

Does the Emergency tab work offline?

Yes. Emergency numbers and guides are bundled with the app and work without any connection.

Where do the answers come from?

Every question cites official English sources from Japanese public authorities, such as the Japan Meteorological Agency (JMA) and the Japan National Tourism Organization (JNTO).

Is my data collected?

No accounts, no ads, no analytics. See the privacy policy for details.

Emergency disclaimer

The app's safety content is educational. In an actual emergency, always follow instructions from local authorities.