Environmental Radiation Database

Condition Selection

The Environmental Radiation Database allows users to search the results of environmental radioactivity surveys conducted by the Nuclear Regulation Authority, in cooperation with relevant ministries and agencies, all 47 prefectures, and other entities.
The data made publicly available has been verified and evaluated by experts and staff within the relevant ministries, agencies, prefectures, and other entities.

The number of relevant data records is counted from the point when all required fields are selected.

Survey PeriodRequired

Please specify the period you wish to search.

Survey AreaRequired

You can select multiple prefectures from all 47 nationwide, or target the entire country of Japan.

Nationwide (47 prefectures)

Areas where prefectures cannot be specified, such as airspace and sea areas

Test SampleRequired

Please select the samples you wish to search.
Multiple selections are possible. However, samples from different categories cannot be selected.

Environmental Samples *Multiple selections allowed

Included samples (subcategory)

Ambient Radiation Level (Discontinuous) *Multiple selections allowed

Included samples (subcategory)

Ambient Radiation Level (Continuous)

Included samples (subcategory)

Survey NuclidesRequired

Please select the nuclides you wish to include in the search. Multiple nuclides may be selected.

Filter by type of radiation:

Filter by nuclide name (partial match):

Selecting a survey sample will display the available survey nuclides.

No need to select survey nuclides.

Target SurveyOptional

You can select the survey to be searched. If not selected, all surveys will be targeted.
For details on each survey, refer to the Target Survey List.

Narrow down target surveys

Matching Data {{ countResult.count }} Items

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Search Results

Important Notes

The search results (table below) display only key items related to the survey results. To view other items, save the search results as a CSV file and check them.

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Filter Conditions

The above search results were retrieved using the following search criteria.

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Important Notes for Use

When citing data, clearly state in the printed material or other medium that the information is sourced from this database.
For citation examples and other important notes, refer to the Site Policy.

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