Radiological Situation in Human Settlements of Japan
List of human settlements of Japan in which monitoring of the background radiation is carried out by online monitoring stations or by manual measurements at stationary observation posts by relevant state institutions or local authorities.
Ehime Prefecture
Fukui Prefecture
Fukushima Prefecture
Gifu Prefecture
Hokkaido
Nagasaki Prefecture
Shimane Prefecture
Tokyo Metropolis
Why Is Verification Necessary?
Map readings are indicative data from their respective providers. If a value appears unusual, check whether the change persists and consult the provider.
For emergency decisions, rely on official information from the relevant authorities.
Data Sources
Radiation dose rate: Safecast Radnote. Wind direction and speed: Open-Meteo.
Map backgrounds: OpenStreetMap, JMA Himawari, and NASA GIBS.
Fukushima restricted zone: the web geometry is a high-resolution vector derived from the official Fukushima Prefecture evacuation-zone concept map (31 March 2025) and georeferenced through the JGD2011 ArcGIS evacuation-zone raster; narrow map-rendering seams between adjacent sections were closed and detached non-zone artifacts removed while mapped release exclusions were preserved; the latest status is checked against the METI evacuation-zone concept map (1 April 2026).
Why Is Verification Necessary?
Map readings are indicative data from their respective providers. If a value appears unusual, check whether the change persists and consult the provider.
For emergency decisions, rely on official information from the relevant authorities.
Data Sources
Radiation dose rate: Safecast Radnote. Wind direction and speed: Open-Meteo.
Map backgrounds: OpenStreetMap, JMA Himawari, and NASA GIBS.
Fukushima restricted zone: the web geometry is a high-resolution vector derived from the official Fukushima Prefecture evacuation-zone concept map (31 March 2025) and georeferenced through the JGD2011 ArcGIS evacuation-zone raster; narrow map-rendering seams between adjacent sections were closed and detached non-zone artifacts removed while mapped release exclusions were preserved; the latest status is checked against the METI evacuation-zone concept map (1 April 2026).
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Why Is Verification Necessary?
Map readings are indicative data from their respective providers. If a value appears unusual, check whether the change persists and consult the provider.
For emergency decisions, rely on official information from the relevant authorities.
Data Sources
Radiation dose rate: Safecast Radnote. Wind direction and speed: Open-Meteo.
Map backgrounds: OpenStreetMap, JMA Himawari, and NASA GIBS.
Fukushima restricted zone: the web geometry is a high-resolution vector derived from the official Fukushima Prefecture evacuation-zone concept map (31 March 2025) and georeferenced through the JGD2011 ArcGIS evacuation-zone raster; narrow map-rendering seams between adjacent sections were closed and detached non-zone artifacts removed while mapped release exclusions were preserved; the latest status is checked against the METI evacuation-zone concept map (1 April 2026).