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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

FreeJapan Alert Decoder

Japan alert decoder · 気象防災速報（線状降水帯直前予測）

Weather disaster bulletin: linear rainband likely within about 3 hours

Prepare and check your route · official rules as of 2026-10-17

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Prepare and check your route

気象防災速報（線状降水帯直前予測）

Weather disaster bulletin: linear rainband likely within about 3 hours

A linear rainband may form within about 2-3 hours. Heavy-rain disasters may follow quickly.

What to do now

  1. Get ready to evacuate now while it is still safe, especially near slopes or rivers.

Issued by: JMA (new in FY2026). 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.