Radioactivity Concentration in Japan

You can check the results of the radioactivity (concentration) survey on various samples conducted by prefectures, if your device has a location feature.
When you click or tap on a location displayed, measurement results for that location will be displayed.

Radioactivity Concentration in Various Locations in Japan



The displayed data is the latest from the Environmental Radiation Database.
Radioactivity values vary depending on the survey location. The value shown does not represent the radioactivity concentration for the prefecture.

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