Environmental Radioactivity and Radiation in Japan

Information on environmental radioactivity and radiation is available on this website.
You can check the results of the environmental radioactivity survey conducted by the Secretariat of the Nuclear Regulation Authority with the cooperation of relevant ministries and prefectural governments. You can also find the definitions of terms and the basic information on environmental radioactivity here.

Radiation Around Me

Environmental Radiation Database

Radiation Around Us

Environmental Radiation Glossary of Terms

Radioactivity in Food

The Series of Environmental Radioactivity Measuring Methods

Utilize Radiation Data

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

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Radiation Around Me

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

Radioactivity Concentration in Japan

You can check the results of radioactivity (concentration) survey on various samples conducted by prefectures.

Environmental Radiation Database

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.

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.

Create a Summary Table

You can create a summary table specifying survey years and the survey area.

Radioactivity in Food

Information on radioactivity related to food is available here.

Learn Radiation Basics

You can learn basic information on radioactivity and radiation.

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What is radioactivity? What is radiation?

Environmental radioactivity and radiation Q&A.

Radiation Around Us

Radiation around us is explained.

Environmental Radiation Glossary of Terms

Terms commonly encountered when talking about environmental radioactivity and radiation are explained here.

Basics of Environmental Radioactivity Measurement

How to collect and pretreat analysis samples, and how to measure environmental radioactivity and radiation are explained.

Explained in Text

Environmental radioactivity and radiation are explained in text for easier understanding.

Library

You can check materials and data on environmental radioactivity.

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Radioactivity Survey on Nuclear Powered Warships

You can check the results of the radioactivity survey on Nuclear Powered Warships that is carried out when they call in a port.

The Series of Environmental Radioactivity Measuring Methods

The Series of Environmental Radioactivity Measuring Methods is available here for downloading in PDF format.

Environmental Radioactivity Survey Reports

Reports of environmental radioactivity surveys are published.

Archive

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TEPCO Fukushima Daiichi Nuclear Power Plant Accident

You can search for data related to the accident at the TEPCO Fukushima Daiichi Nuclear Power Plant.

Past Events Envisaged by Measurement Data

Past events that had a major impact on the values of environmental radioactivity concentration and radiation are explained here.

Global Radioactivity Concentration in 2000

You can check the radioactivity concentration in the world in the year 2000.

Radon Concentration Survey

You can check the results of radon concentration surveys.

What’s New

March 25, 2024 NEW

The Page of “The Series of Environmental Radioactivity Measuring Methods” has been revamped.

November 15, 2021

We have prepared a brochure of this website.

June 24, 2021

The Series of Environmental Radioactivity Measuring Methods “No. 35 Environmental Sample Collection Methods in Emergency” was published.
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