Japan Atomic Energy Agency (JAEA) collects and discloses the results of measurement of air dose rates in Fukushima Prefecture and neighboring prefectures due to the accident at TEPCO's Fukushima Daiichi NPP, which are disclosed by the Nuclear Regulation Authority and Fukushima Prefecture, etc., as well as the results of analysis of radioactive materials in land soil (soil surface and in soil), sea area (sea water, sea bottom soil), rivers (river water, river bottom soil) and underground water, food (agricultural, forestry, livestock, marine products, etc.). The results are made public so that users can intuitively grasp the situation by visualizing the large volume of data.
Thank you for your continued use of this website.
As of March 10, 2026, this database has been migrated to the Environmental Radiation Monitoring Information following the Great East Japan Earthquake (RAMDAS), operated by the Nuclear Regulation Authority of Japan.
Please use the new website at the URL below going forward.