Tsunami Warnings in Japan
Tsunami Warnings for Japan (East Asia) come from Japan Meteorological Agency (JMA), Fire and Disaster Management Agency (FDMA). This page explains what these warnings mean, which authority publishes them, and how to check the current status for Tokyo.
Check live tsunami status for TokyoBrowse all warnings
At a glance
- countryJapan · Asia
- reference cityTokyo (35.68, 139.69)
- emergencyPrimary emergency number110 / 119
- risk profilestorm, flood, heat, cold, wildfire, earthquake, volcano, tsunami, landslide, coastal, radiation
What counts as a tsunami warnings
Tsunami warnings are issued by regional warning centres after a large undersea earthquake, volcanic eruption or landslide. A warning means waves are expected; the first wave is often not the largest, and wave arrival times are published per coastal segment. Natural warning signs - strong shaking, a sudden sea retreat, a loud roar - mean leave immediately without waiting for an official message.
Who issues tsunami warnings in Japan
Warning levels, colours and terminology are set nationally. Always read the warning text of the issuing authority: it names the affected districts, the expected time window and the recommended action.
If a warning is active in Japan
- Move inland and at least 30 m above sea level, on foot, immediately.
- Stay away for hours: wave trains continue long after the first wave.
- Do not return to the coast until the all-clear from the official warning centre.
Where the data comes from
Waarning reads public, key-free sources for Japan: NOAA PTWC, JMA, national tsunami warning centres, USGS. Measurements and official warnings are shown separately, and official warnings always keep the name of the authority that issued them.
Frequently asked questions
Who issues tsunami warnings in Japan?
Japan Meteorological Agency (JMA), Fire and Disaster Management Agency (FDMA). Waarning does not issue warnings; it aggregates the public feeds of these bodies and links back to the original source.
What is the emergency number in Japan?
The primary emergency number is 110 / 119. Use it for a life-threatening situation; for non-urgent reports use the local police station number.
Does Waarning show live tsunami warnings for Japan?
Yes. The dashboard loads the current values for Tokyo from NOAA PTWC, JMA, national tsunami warning centres, USGS. You can open it with one click and the location is already set.
More warnings for Japan
- Severe Weather Warnings
- Flood Warnings
- Heat Warnings
- Cold and Snow Warnings
- Wildfire Warnings
- Air Quality Warnings
Tsunami Warnings in nearby countries
Generated 2026-10-18. Waarning is not an official warning service; in an emergency follow local authorities and emergency services.