Radiation Warnings in Japan
Radiation 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 nuclear 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 radiation warnings
Radiation warnings are issued by nuclear regulators and civil protection after a release of radioactive material, or as a precaution around a nuclear facility. Protective measures are specific and ordered: sheltering, closing ventilation, taking stable iodine only when instructed, and avoiding contaminated food and water.
Who issues radiation 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
- Shelter indoors, close windows and switch off ventilation until told otherwise.
- Take stable iodine only on official instruction - never on your own.
- Do not consume fresh local produce, milk or rainwater until cleared.
Where the data comes from
Waarning reads public, key-free sources for Japan: IAEA, national nuclear regulators, civil protection agencies, CTBTO. 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 radiation 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 radiation warnings for Japan?
Yes. The dashboard loads the current values for Tokyo from IAEA, national nuclear regulators, civil protection agencies, CTBTO. 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
Radiation Warnings in nearby countries
Generated 2026-10-14. Waarning is not an official warning service; in an emergency follow local authorities and emergency services.