Utilize Radiation Data

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You can search for data or check radiation around you in detailed information or in charts using the results of the environmental radioactivity survey conducted by the Secretariat of the Nuclear Regulation Authority.

Radiation Around Me

Radiation Around Me

You can check the radiation (air radiation dose rate) measured at the monitoring post near you, 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 Japan

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.

Environmental Radiation Database

Environmental Radiation Database

Here, you can search for the results of surveys on the radioactivity level in the environment conducted by the Secretariat of the Nuclear Regulation Authority with the cooperation of relevant ministries and prefectural governments, etc.
Data registered in the Environmental Radiation Database is checked and assessed by specialists or staff of the relevant ministry or prefectural government.

Create a Chart

Create a Chart

Using data registered to the Environmental Radiation Database, you can create charts of air radiation dose rates, annual changes, and concentration ranges with setting conditions.
You can easily create a chart by selecting the type of chart you want to create and then simply following the instructions displayed on your screen.
Please note that some data for the atmosphere and ocean cannot be specified for certain prefectures, and you cannot create charts for such data.

Air Radiation Dose Rate Chart

You can create a chart in which air radiation dose rates (maximum, average, minimum) are plotted.

Annual Change Chart

You can create a chart in which radioactivity concentration is plotted against time (year).

Concentration Range Chart

You can create a concentration range chart using radioactivity concentration data.

Create a Summary Table

Create a Summary Table

You can create a summary table specifying survey years and the survey area.
You can easily create a summary table by simply following the instructions displayed on your screen.

Radioactivity in Food

Radioactivity in Food

Information on radioactivity related to food is available here. You can check the level of radioactivity in various food, and committed effective doses for evaluating the impact of radioactivity taken into our bodies through food consumption.

Search by Food

You can select food to check the radioactivity level of that food.

Search by Region

You can select a prefecture to check the radioactivity level of food sampled in the prefecture.

Search by Nuclide

You can select a nuclide to check the radioactivity level of that nuclide in food.

What is Committed Effective Dose?

Committed effective dose is explained in detail.

Committed Effective Dose by Food Category

You can check the committed effective dose by food category.