The Japan Atomic Energy Agency (JAEA) is collecting monitoring data (published by various organizations including the Secretariat of The Nuclear Regulatory Authority and Fukushima Prefecture) related to the Tokyo Electric Power Company (TEPCO) Fukushima Daiichi Nuclear Power Plant accident, including air dose rate, and radioactive concentration (ground surface, soil, seawater, marine soil, river water, river sediment, groundwater, and food). JAEA is also collecting geographical information including altitude, soil, vegetation, land use, and meteorological data. JAEA created intuitive and comprehensible visualizations based on this data and released them to the public through this website.
The Database for Radioactive Substance Monitoring Data has been renewed.
https://emdb.jaea.go.jp/emdb/
The old site will be published as it is, but the data will be updated on the new site.
Radioactive substances released to the atmosphere by the Fukushima Daiichi NPP accident were eventually deposited on the land of Japan and contaminated ground soil, forests, ocean, and rivers. Data here are results of radioactive substance monitoring conducted by the various organizations including national government, local governments, and power companies to investigate the situation with regards to the dispersion of radioactive substances.
To support analysis related to distribution of radioactive substances, geographical information including elevation, soil, vegetation, land-use, and accumulated snow status were collected and organized. To compare or analyze under unified standard, these geographical data were created with 100 m × 100 m grids that the Standard Grid Squares (Third Area Partitions) were subdivided into squares with a side of 100m.
