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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（線状降水帯発生）

Weather disaster bulletin: linear rainband occurring

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（線状降水帯発生）

Weather disaster bulletin: linear rainband occurring

A line of thunderstorms (線状降水帯) is dropping very heavy rain on the same place for hours. Life-threatening floods and landslides can happen quickly. Formerly 顕著な大雨に関する気象情報.

What to do now

  1. Check your area on KIKIKURU and evacuate early if you are in a danger area.
  2. If it is dark or roads are already flooded, move to a higher floor instead.

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.