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.
In order to confirm the condition in the depth distribution of radioactive cesium comprehensively mainly within a 80 km radius of the Fukushima Dai-ichi NPP, we collected soil samples at various depths using a scraper plate which is the standard method to measure radioactive nuclides in soil profiles employed at IAEA and researched the depth distribution of radioactive cesium.
This is the Database for Radioactive Substance Monitoring Data renewed and released on October 1, 2021. Click here for the old site.