Database

Air Dose Rate

Measured air dose rate data, i.e. the amount of radiation per unit time in the air (Air absorbed dose rates[nGy/h], or ambient dose equivalent rate[μSv/h]). The air dose rate is continuously observed around the nuclear facilities to detect abnormality including radioactive substances leakage.

Radioactive Concentration-Survey of Depth Distribution in Soil

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.

Radioactive Concentration-Seawater

Measured data of radioactive substances released to the environment by Fukushima Daiichi NPP accident in seawater.

Radioactive Concentration-Marine Soil

Measured data of radioactive substances released to the environment by Fukushima Daiichi NPP accident in marine soil.

Radioactive Concentration-Deposition

Measured data of radioactive concentration deposited on the surface soil after TEPCO's FDNPP accident.

Radioactive Concentration-Soil /  Environment Sample Analysis

Measured data of radioactive substances released to the environment by Fukushima Daiichi NPP accident including ground deposition, radioactive concentration of soil sample and environmental sample, and radioactive substance depth distribution.

Radioactive Concentration-Atmosphere Dust (floating)

Measured data of radioactive substances in the Atomosphere Dust (floating).

Radioactive Concentration-Atmosphere Dust (fallout)

Measured data of radioactive substances in the Atmosphere Dust (fallout) and rainfall.

Radioactive Concentration-River Water

Measured data of radioactive substances in the water including river water and lake water.

Radioactive Concentration-River Soil

Measured data of River Bottom Sediment Quality, Environment around the river, and Rivers Suspended Sediment.

Radioactive Concentration-Drinking water, spring water, domestic water, etc

Data of radioactive substances measured to maintain our safety and security of drinking water.

Radioactive Concentration-Game Meat and Aquatic organism

Data of radioactive substances measured to maintain our safety and security of Wild Birds and Animals.

Radioactive Concentration-towing monitoring

Measured data of the radioactive cesium on the bottom of the sea by ship towing monitoring.

Radioactive Concentration-Food

Data of radioactive substances measured to maintain our safety and security of food including agricultural products, livestock products, fishery products, and processed food.

Radioactive Concentration-Waste

Data of radioactive substances measured to waste, sewage sludge, etc. contaminated by radioactive materials.

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Updates All Updates History

2026.10.9 New

 The survey results have been added to the following measurement items.
   ・Air Dose Rate: Vehicle-borne Survey: Patterns of daily activities (Vehicle-borne Survey)
   ・Radioactive Concentration-Atmosphere Dust (fallout): Atmosphere Dust (fallout): Rainfall Monitoring Results
   ・Radioactive Concentration-Drinking water, spring water, domestic water, etc: Drinking Water: Fukushima Prefecture drinking water monitoring test results
   ・Radioactive Concentration-Game Meat and Aquatic organism: Aquatic organism: Monitoring Results of Sea Area related to ALPS-treated water (Aquatic Organisms) by MOE
   ・Radioactive Concentration-Game Meat and Aquatic organism: Aquatic organism: Readings of the Monitoring on Radioactivity Level in Fisheries Products by Fisheries Agency
   ・Radioactive Concentration-Marine Soil: Marine Soil: Monitoring Results of Radioactive Substances in Aquatic Organisms (Bottom Sediment Quality - Sea Area) by MOE
   ・Radioactive Concentration-Marine Soil: Marine Soil: Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Marine Soil)
   ・Radioactive Concentration-Seawater: Seawater: Distribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
   ・Radioactive Concentration-Seawater: Seawater: Monitoring Results of Radioactive Substances in Aquatic Organisms (Water Quality - Sea Area) by MOE
   ・Radioactive Concentration-Seawater: Seawater: Monitoring Results of Sea Area related to ALPS-treated water (Seawater) by MOE
   ・Radioactive Concentration-Seawater: Seawater: Monitoring Results of Seawater monitoring in Tokyo Bay by MLIT
   ・Radioactive Concentration-Seawater: Seawater: Monitoring of the east side of the turbine buildings of Units 1-4 and ports by TEPCO
   ・Radioactive Concentration-Seawater: Seawater: Readings of Sea Area Monitoring (Seawater) by NRA
   ・Radioactive Concentration-Seawater: Seawater: Reinforcement of Monitoring in Fukushima Daiichi Nuclear Power Station Peripheral Sea Area (Seawater)
   ・Radioactive Concentration-Seawater: Seawater: Results of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
   ・Radioactive Concentration-Soil / Environment Sample Analysis: Soil / Environment Sample Analysis: Results of monitoring tests on pasture and forage crops by Fukushima Prefecture
2026.9.30 New

 The survey results have been added to the following measurement items.
   ・Radioactive Concentration-River Water: River / Lake Water: Monitoring Results of Radioactive Substances in Aquatic Organisms (Water Quality) by MOE
   ・Radioactive Concentration-River Soil: River Bottom Sediment Quality: Monitoring Results of Radioactive Substances in Aquatic Organisms (Bottom Sediment Quality) by MOE
   ・Radioactive Concentration-Seawater: Seawater: Monitoring Results of Seawater monitoring in Tokyo Bay by MLIT
   ・Radioactive Concentration-Seawater: Seawater: Readings of Sea Area Monitoring (Seawater) by NRA
   ・Radioactive Concentration-Seawater: Seawater: Distribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
   ・Radioactive Concentration-Seawater: Seawater: Monitoring Results of Sea Area related to ALPS-treated water (Seawater) by MOE
   ・Radioactive Concentration-Seawater: Seawater: Monitoring of the east side of the turbine buildings of Units 1-4 and ports by TEPCO
   ・Radioactive Concentration-Food: Food: Monitoring Results of Radioactive Materials in School Meals at Municipalities and Prefectural Schools in Fukushima Prefecture
   ・Radioactive Concentration-Game Meat and Aquatic organism: Aquatic organism: Readings of the Monitoring on Radioactivity Level in Fisheries Products by Fisheries Agency
   ・Radioactive Concentration-Waste: Sewage sludge: Radioactive Concentration of Sewage Sludge in Basin Sewage Treatment Plant by Fukushima Prefecture
2026.8.31

 The survey results have been added to the following measurement items.
   ・Radioactive Concentration-SeawaterーSeawaterーMonitoring Results of Sea Area related to ALPS-treated water (Seawater) by MOE
   ・Radioactive Concentration-SeawaterーSeawaterーReadings of Sea Area Monitoring (Seawater) by NRA
   ・Radioactive Concentration-SeawaterーSeawaterーMonitoring Results of Seawater monitoring in Tokyo Bay by MLIT
   ・Radioactive Concentration-SeawaterーSeawaterーTokyo Electric Power Company's monitoring of the east side of the turbine buildings for Units 1-4 and the port.
   ・Radioactive Concentration-SeawaterーSeawaterーDistribution of Radioactivity Concentration in the Seawater around Fukushima Dai-ichi NPP by TEPCO
   ・Radioactive Concentration-SeawaterーSeawaterーSeawaterーMeasurements of subdrain, groundwater drain, and groundwater bypass by Fukushima Prefecture
   ・Radioactive Concentration-SeawaterーSeawaterーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
   ・Radioactive Concentration-SeawaterーSeawaterーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Sea Water)
   ・Radioactive Concentration-Marine SoilーMarine SoilーDistribution of Radioactivity Concentration in the Marine Soil around Fukushima Dai-ichi NPP by TEPCO
   ・Radioactive Concentration-Marine SoilーMarine SoilーResults of Environmental Radioactivity Monitoring by Fukushima Prefecture (Ports and Sea Surface Fishing Ground) (Marine Soil)
   ・Aquatic organismーAquatic organismーMonitoring Results of Sea Area related to ALPS-treated water (Aquatic Organisms) by MOE
   ・Aquatic organismーAquatic organismーReadings of the Monitoring on Radioactivity Level in Fisheries Products by Fisheries Agency
   ・Aquatic organismーAquatic organismーReadings of the Monitoring on Radioactivity Level in fish and shellfish by TEPCO
   ・Radioactive Concentration-Atmosphere Dust (floating)ーAtmosphere Dust (floating)ーReadings of Atmosphere Dust Sampling by NRA and Fukushima Prefecture
   ・Radioactive Concentration-Soil / Environment Sample Analysis ーSoil / Results of monitoring inspections of pasture grass and forage crops by Fukushima Prefecture
   ・Radioactive Concentration-Atmosphere Dust (fallout)ーMonthly FalloutーResults of monthly fallout measurements within Fukushima Prefecture by Fukushima Prefecture
   ・Radioactive Concentration-Atmosphere Dust (fallout): Atmosphere Dust (fallout): Rainfall Monitoring Results
   ・Radioactive Concentration-Drinking water, spring water, domestic water, etc: Groundwater: Environmental Monitoring Results within the Contaminated Waste Management Area by MOE (Groundwater)
   ・Radioactive Concentration-Drinking water, spring water, domestic water, etcーDrinking WaterーResults of drinking water monitoring tests conducted by Fukushima Prefecture