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Disaster 防災

Earthquakes, typhoons, heavy rain — where to check warnings, and what the alert levels mean.

Last verified 2026-07-10

Learn one thing today: at Alert Level 4 (警戒レベル4), everyone in the affected area must evacuate. Do not wait for Level 5.

Official links

Every link below goes to an official source. We show the domain so you can check it yourself.

Tokyo Disaster Prevention Homepage www.bousai.metro.tokyo.lg.jp Tokyo Metropolitan Government verified 2026-07-10 Evacuation information and disaster updates. Use the language switcher (15 languages).
Weather warnings and advisories www.jma.go.jp Japan Meteorological Agency (気象庁) verified 2026-07-10 Official English warnings: typhoons, heavy rain, earthquakes, tsunami.
Alert Levels 1–5 explained tabunka.tokyo-tsunagari.or.jp Tokyo Intercultural Portal Site (TIPS) verified 2026-07-10 Level 3 = elderly and vulnerable people evacuate. Level 4 = everyone evacuates.
Tokyo Bousai — disaster preparedness guidebook (English PDF) www.bousai.metro.tokyo.lg.jp Tokyo Metropolitan Government verified 2026-07-10 Read it before a disaster, not during one.