August 31, 2017


3 survey results were updated.
  • Survey Results of Environmental Radioactivity Level in the National Forests in Fukushima Prefecture
  • Results of Monitoring (Seawater) by MOE
  • Results of Monitoring (Marine Soil) by MOE

August 10, 2017


2 survey results were updated.
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) Daily Average
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution)

July 31, 2017


11 survey results were updated.
  • Monitoring Results of Aquatic Organisms (Water Quality)
  • Monitoring Results of Aquatic Organisms (Bottom Sediment Quality)
  • Monitoring Results of Aquatic Organisms (Seawater)
  • Monitoring Results of Aquatic Organisms (Bottom Sediment - Sea)
  • Readings of Accumulated Dose outside the 20 km Zone of TEPCO Fukushima Dai-ichi NPP (Measured by Glass Badge Dosimeter)
  • Readings of Environmental Radiation Level by Emergency Monitoring
  • Measurement Results of Radioactivity Concentration in Food Products in Fukushima Prefecture
  • Radiation Monitoring Survey Results of Wild Birds and Animals
  • Readings of Sea Area Monitoring (Seawater) by NRA
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Marine Soil)

June 30, 2017


2 survey results were updated.
  • Readings of Sea Area Monitoring (Marine Soil) by NRA
  • Readings of Dust Sampling in 20km Zone of TEPCO Fukushima Dai-ichi NPP

May 19, 2017


14 survey results were updated.
  • Survey Results of Environmental Radioactivity Level in the National Forests in Fukushima Prefecture
  • Results of the Monitoring of Soil Samples
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Marine Soil)
  • Readings of Soil Monitoring in 20km Zone of TEPCO Fukushima Dai-ichi NPP
  • Distribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO
  • Distribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
  • Results of Environmental Radiation Monitoring for Child Welfare Institutions
  • Readings of Sea Area Monitoring (Seawater) by NRA
  • Air Dose Rate Readings inside the 20 km Zone of Fukushima Dai-ichi NPP
  • Results of Measurement of Air Dose Rates at Fixed Observation Points using a Monitoring Car
  • Readings of Accumulated Dose outside the 20 km Zone of TEPCO Fukushima Dai-ichi NPP (Measured by Glass Badge Dosimeter)
  • Readings of Accumulated Dose outside the 20 km Zone of TEPCO Fukushima Dai-ichi NPP (Measured by Digital Dosimeter)
  • Readings of Accumulated Dose by The Federation of Electric Power Companies of Japan (Member Companies)
  • Monitoring Information for the Agricultural, Forest and Fishery Products in Ibaraki Prefecture

April 28, 2017


34 survey results were updated.
  • Air Dose Rate Measurements in the Distribution Survey of Radioactive Substances
  • Fukushima Prefecture Environmental Radiation Monitoring-Mesh Investigation
  • Vehicle-borne Survey in the Distribution Survey of Radioactive Substances (KURAMA)
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) Daily Average
  • Readings of Environmental Radiation Monitoring (at Hot springs) in Fukushima Prefecture
  • Readings of Environmental Radiation Monitoring (at Tourist Spots) in Fukushima Prefecture
  • Airborne Monitoring in the Distribution Survey of Radioactive Substances
  • Unmanned Helicopter Monitoring in the Distribution Survey of Radioactive Substances
  • Readings from Radiation Monitoring of Soil (Dry Soil) in Fukushima Prefecture
  • Readings from Radiation Monitoring of Soil in Fukushima Prefecture
  • Readings of Environmental Radiation Level of Soil Sampling in Schools in Fukushima Prefecture
  • Depth Distribution of Radioactive Cesium in Soil Collected Using a Scraper Plate in the Distribution Survey of Radioactive Substances
  • Deposition of Gamma-Emitting Nuclides in the Distribution Survey of Radioactive Substances
  • Unmanned Helicopter Monitoring in the Distribution Survey of Radioactive Substances
  • Measurement Results of Radioactivity Concentration in Food Products in Fukushima Prefecture
  • Measurement Results of the Radiation Monitoring Targeting the Former Evacuation-Prepared Area in case of Emergency and Area to which Evacuation Orders Are Ready to be Lifted (Rivers) (Surrounding Environment)
  • Measurement Results of the Radiation Monitoring Targeting the Former Evacuation-Prepared Area in case of Emergency and Area to which Evacuation Orders Are Ready to be Lifted (Rivers) (Water Quality)
  • Measurement Results of the Radiation Monitoring Targeting the Former Evacuation-Prepared Area in case of Emergency and Area to which Evacuation Orders Are Ready to be Lifted (Rivers) (Bottom Sediments)
  • Nuclide Analysis of River Water Sampled from Rivers in Fukushima Prefecture in the Distribution Survey of Radioactive Substances
  • Nuclide Analysis of Bottom Sediment Sampled from Rivers in Fukushima Prefecture in the Distribution Survey of Radioactive Substances
  • Nuclide Analysis of Suspended Sediment Sampled from Rivers in Fukushima Prefecture in the Distribution Survey of Radioactive Substances
  • Readings of Sea Area Monitoring (Marine Soil) by MEXT
  • Readings of Sea Area Monitoring (Seawater) by MEXT
  • Survey of North Pacific Environmental Radioactivity Levels
  • Results of Monitoring (Seawater) by JCG
  • Readings of Sea Area Monitoring (Marine Soil) by NRA
  • Readings of Sea Area Monitoring (Seawater) by NRA
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Marine Soil)
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
  • Results of Monitoring (Marine Soil) by MOE
  • Results of Monitoring (Seawater) by MOE
  • Monitoring Results of Aquatic Organisms (Bottom Sediment - Sea)
  • Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Seawater)
  • Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Marine Soil)

February 26, 2016


1 survey results was updated.
  • Measurement Results of Radioactivity Concentration in Food Products in Fukushima Prefecture

February 19, 2016


Results of Air Dose Rates Measured by Route Buses in Fukushima Prefecture were released.
  • Results of Air Dose Rates Measured by Route Buses in Fukushima Prefecture (4 buses, Jan. 2013-) - Weekly Average
6 survey results were updated.
  • Distribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
  • Distribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO
  • Drinking Water Results Measured by Environmental Radioactivity Monitoring Center of Fukushima Fukushima Branch
  • Rainfall Monitoring Results
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) ( From April 2015 to November 2015 )
  • Measurement Results of the Test Operation Fish Catches

January 15, 2016


1 survey results was updated.
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) Daily Average

December 18, 2015


3 survey results were updated.
  • Distribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO
  • Readings of the Eighth Fukushima Prefecture Environmental Radiation Monitoring in Mesh Survey
  • Readings of the First to Eighth Fukushima Prefecture Environmental Radiation Monitoring in Mesh Surveys
Results of Unmanned Helicopter Monitoring in the Distribution Survey of Radioactive Substances were released.
  • Results of Air Dose Rate of the First Unmanned Helicopter Monitoring within the 3 km Radius from the Fukushima Dai-ichi NPP ( Decay correction: October 20, 2012 )
  • Results of Air Dose Rate Measurement in Riverbank by Unmanned Helicopter ( Decay correction: January 31, 2013 )
  • Results of Air Dose Rate of the Second Unmanned Helicopter Monitoring within the 3 km Radius from the Fukushima Dai-ichi NPP ( Decay correction: March 20, 2013 )
  • Results of Air Dose Rate of the Unmanned Helicopter Monitoring within the 5 km Radius from the Fukushima Dai-ichi NPP ( From June 2013 to July 2013 )
  • Results of Air Dose Rate of the Unmanned Helicopter Monitoring within the 5 km Radius from the Fukushima Dai-ichi NPP ( From November 2013 to January 2014 )
  • Results of Air Dose Rate of the Unmanned Helicopter Monitoring within the 5 km Radius from the Fukushima Dai-ichi NPP ( from June 2014 to July 2014 )
  • Results of Radioactive Cesium Deposition of the First Unmanned Helicopter Monitoring within the 3 km Radius from the Fukushima Dai-ichi NPP ( Decay correction: October 20, 2012 )
  • Results of Radioactive Cesium Deposition Measurement in Riverbank by Unmanned Helicopter ( Decay correction: January 31, 2013 )
  • Results of Radioactive Cesium Deposition of the Second Unmanned Helicopter Monitoring within the 3 km Radius from the Fukushima Dai-ichi NPP ( Decay correction: March 20, 2013 )
  • Results of Radioactive Cesium Deposition of the Unmanned Helicopter Monitoring within the 5 km Radius from the Fukushima Dai-ichi NPP ( From June 2013 to July 2013 )
  • Results of Radioactive Cesium Deposition of the Unmanned Helicopter Monitoring within the 5 km Radius from the Fukushima Dai-ichi NPP ( From November 2013 to January 2014 )
  • Results of Radioactive Cesium Deposition of the Unmanned Helicopter Monitoring within the 5 km Radius from the Fukushima Dai-ichi NPP ( from June 2014 to July 2014 )

December 02, 2015


2 survey results were updated.
  • Readings of Sea Area Monitoring (Seawater) by NRA
  • Readings of Sea Area Monitoring (Marine Soil) by NRA

November 25, 2015


6 survey results were updated.
  • Monitoring Results of Strontium in Fisheries Products Conducted by Fisheries Research Agency
  • Radiation Monitoring Survey Results of Wild Birds and Animals
  • Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Seawater)
  • Reinforcement of Environmental Radiation Monitoring in Examination Operation Sea Area
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Marine Soil)

November 11, 2015


Geographical Information of East Japan (Tokyo and 11 prefectures) was registered.
  • Fundamental Geospatial Data (DEM) 10 m Mesh (Elevation)
  • 1:200,000 Seamless Land Conservation Map (Vegetation)
  • JASMES-CSF Snow Accumulation Data
  • High Resolution Land-Use and Land-Cover Map
  • 1:200,000 Fundamental Land Classification Map (Soil)

November 06, 2015


6 survey results were updated.
  • Distribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
  • Reading of Environmental Radioactivity Level by Prefecture (Fallout)
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) ( From April 2014 to March 2015 )
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) ( From April 2013 to January 2014 )
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) ( From April 2012 to March 2013 )
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) ( From February 2012 to March 2012 )
Mapping Tool version 2.0.1.5 was released.
  • Bug fix for KML output when changing symbol types in the depth distribution function.
  • Setting of R was improved for visualizations using Kriging interpolation.

October 19, 2015


Airborne monitoring results were updated.

The data consists of air dose rates / radioactive cesium deposition densities at the median points of the Quarter Grid Squares (approximately 250 m x 250 m) defined by JIS X 0410.

  • Air Dose Rate Measurement Results at the Height of 1 m above the Ground in Fukushima Prefecture and the Neighboring Prefectures (As of November 19, 2013 (32nd Month After the Accident)) ( Decay correction: November 19, 2013 )
  • Air Dose Rate Results of the Seventh Airborne Monitoring Survey ( Decay correction: September 28, 2013 )
  • Air Dose Rate Results of the Airborne Monitoring Survey in the Areas to which Evacuation Orders Have Been Issued ( Decay correction: March 11, 2013 )
  • Air Dose Rate Results of the Sixth Airborne Monitoring Survey and Airborne Monitoring Survey Outside 80 km from the Fukushima Dai-ichi NPP ( Decay correction: December 28, 2012 )
  • Air Dose Rate Results of the Fifth Airborne Monitoring Survey and Airborne Monitoring Survey Outside 80 km from the Fukushima Dai-ichi NPP ( Decay correction: June 28, 2012 )
  • Air Dose Rate Results of the Airborne Monitoring Survey by Prefecture ( Decay correction: May 31, 2012 )
  • ir Dose Rate Results of the Airborne Monitoring Survey in the Restricted Areas and Planned Evacuation Zones ( Decay correction: February 10, 2012 )
  • Air Dose Rate Results of the Fourth Airborne Monitoring Survey ( Decay correction: November 5, 2011 )
  • Air Dose Rate Results of the Third Airborne Monitoring Survey ( Decay correction: July 2, 2011 )
  • Air Dose Rate Results of the Second Airborne Monitoring Survey ( Decay correction: May 26, 2011 )
  • Air Dose Rate Results of the First Airborne Monitoring Survey ( Decay correction: April 29, 2011 )
  • Results of Deposition of Radioactive Cesium of the Airborne Monitoring Survey in the Areas to which Evacuation Orders Have Been Issued ( Decay correction: March 11, 2013 )
  • Results of Deposition of Radioactive Cesium of the Sixth Airborne Monitoring Survey and Airborne Monitoring Survey Outside 80 km from the Fukushima Dai-ichi NPP ( Decay correction: December 28, 2012 )
  • Results of Deposition of Radioactive Cesium of the Fifth Airborne Monitoring Survey and Airborne Monitoring Survey Outside 80 km from the Fukushima Dai-ichi NPP ( Decay correction: June 28, 2012 )
  • Results of Deposition of Radioactive Cesium of the Airborne Monitoring Survey by Prefecture ( Decay correction: May 31, 2012 )
  • Results of Deposition of Radioactive Cesium of the Airborne Monitoring Survey in the Restricted Areas and Planned Evacuation Zones ( Decay correction: February 10, 2012 )
  • Results of Deposition of Radioactive Cesium of the Fourth Airborne Monitoring Survey ( Decay correction: November 5, 2011 )
  • Results of Deposition of Radioactive Cesium of the Third Airborne Monitoring Survey ( Decay correction: July 2, 2011 )
  • Results of Deposition of Radioactive Cesium of the Second Airborne Monitoring Survey ( Decay correction: May 26, 2011 )
  • Results of Deposition of Radioactive Cesium of the First Airborne Monitoring Survey ( Decay correction: April 29, 2011 )

October 07, 2015


5 Geographical Information was registered.
  • Fundamental Geospatial Data (DEM) 10 m Mesh (Elevation)
  • 1:200,000 Seamless Land Conservation Map (Vegetation)
  • JASMES-CSF Snow Accumulation Data
  • High Resolution Land-Use and Land-Cover Map
  • 1:200,000 Fundamental Land Classification Map (Soil)
1 survey result was updated.
  • Measurement Results of Air Dose Rates Nationwide and in Fukushima Prefecture (Real-time Distribution) Daily Average

August 05, 2015


5 survey results were updated.
  • Readings of Environmental Radiation Monitoring (at Hot springs) in Fukushima Prefecture
  • Readings of Environmental Radiation Monitoring (at Tourist Spots) in Fukushima Prefecture
  • Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Seawater)
  • Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Marine Soil)
  • Reinforcement of Environmental Radiation Monitoring in Examination Operation Sea Area

June 19, 2015


2 survey results were updated.
  • Monitoring Results of Strontium in Fisheries Products Conducted by Fisheries Research Agency
  • Rainfall Monitoring Results

June 08, 2015


5 survey results were updated.
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
  • Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Marine Soil)
  • Radiation Monitoring Survey Results of Wild Birds and Animals
  • Results of the Monitoring of Soil Samples
  • Readings of Soil Monitoring in 20km Zone of TEPCO Fukushima Dai-ichi NPP

May 29, 2015


10 survey results were updated.
  • Measurement Results of Radioactivity Concentration in Food Products in Fukushima Prefecture
  • Readings of Radioactivity Level in Drinking Water by Prefecture
  • Readings of Accumulated Dose outside the 20 km Zone of TEPCO Fukushima Dai-ichi NPP (Measured by Digital Dosimeter)
  • Readings of Accumulated Dose outside the 20 km Zone of TEPCO Fukushima Dai-ichi NPP (Measured by Glass Badge Dosimeter)
  • Readings of Accumulated Dose by The Federation of Electric Power Companies of Japan (Member Companies)
  • Air Dose Rate Readings inside the 20 km Zone of Fukushima Dai-ichi NPP
  • Results of Measurement of Air Dose Rates at Fixed Observation Points using a Monitoring Car
  • Reading of Air Dose Rate for the Monitoring Post in Momijiyama (Fukushima City)
  • Readings of Environmental Radiation Level by Emergency Monitoring
  • Reading of Environmental Radioactivity Level by Prefecture (Monthly Fallout)

May 15, 2015


2 survey results were updated.
  • Readings of Sea Area Monitoring (Seawater) by NRA
  • Readings of Sea Area Monitoring (Marine Soil) by NRA

February 27, 2015


"Database for Radioactive Substance Monitoring Data" was released.