Skip to content

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 · レベル2高潮注意報

Level 2 Advisory (Storm Surge) · Level 2

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

← Decode another alert · Earthquake Early Warning on a train

Or tap one

Where are you? (optional)
Level 2Prepare and check your route

レベル2高潮注意報

Level 2 Advisory (Storm Surge)

Yellow, Alert Level 2 equivalent: conditions may worsen. Check the hazard map and how you would evacuate. Hazard: sea water flooding the coast during a typhoon or deep low.

What to do now

  1. Check the hazard map for your area and your evacuation route.
  2. Talk with family or travel companions about where to go.
  3. Watch for updates.
  4. Stay away from the coast, harbours and low coastal land.

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

source 1source 2source 3

Share on X

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.