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Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first. Full disclaimer

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Japan alert decoder · 気象防災速報（記録的短時間大雨）

Weather disaster bulletin: record short-duration heavy rain

Evacuate now from dangerous places · official rules as of 2026-10-17

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Evacuate now from dangerous places

気象防災速報（記録的短時間大雨）

Weather disaster bulletin: record short-duration heavy rain

Rain of a once-in-several-years intensity has been observed within about an hour. Disasters may be happening nearby. Formerly 記録的短時間大雨情報.

What to do now

  1. Check KIKIKURU; if your area is purple or black, take safety action now.
  2. Avoid underpasses, basements and rivers.

Issued by: JMA (prefecture level). Live status: JMA warnings map (English)JMA earthquake information (English)JMA tsunami information (English)

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Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first.

Data as of 2026-10-17 from official JMA, Cabinet Office, Cabinet Secretariat (J-ALERT) and Ministry of the Environment pages, with official names from the JMA multilingual dictionary (2026-03-26). Not affiliated with JMA or any government agency.

Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first. Data as of 2026-10-17 from official JMA, Cabinet Office, Cabinet Secretariat (J-ALERT) and Ministry of the Environment pages, with official names from the JMA multilingual dictionary (2026-03-26). Not affiliated with JMA or any government agency.