United Nations Scientific Committee on the Effects of Atomic Radiation

ATTACHMENT A-5

DATA SETS DOWNLOADED FROM THE JAPANATOMIC ENERGY AGENCY ENVIRONMENTMONITORING DATABASEUNSCEAR 2020/2021 Report, Annex B, Levels and effects of radiation exposuredue to the accident at the Fukushima Daiichi Nuclear Power Station: implicationsof information published since the UNSCEAR 2013 Report
Contents
The Japan Atomic Energy Agency (JAEA) collected environmental monitoring data publishedby various organizations related to the following Fukushima Daiichi Nuclear Power Station(FDNPS) accident, including dose rate in air (from airborne and deposited radionuclides), andradionuclide concentrations (air, ground surface, soil, seawater, marine soil, river water, river
sediment, groundwater, drinking water and food) to form the Environment Monitoring Database(EMDB) which is available to the public through an online website at [JAEA, WEB].
A total of 62 data sets related to the measurement of dose rate in air, radionuclide grounddeposition density, and radionuclide concentrations in air and in food and drinking water were
downloaded from EMDB by the Committee over the period between August and October 2018.
These data sets reported the results of over 200 radiation surveys carried out in Japan between
March 2011 and March 2018 by Government bodies and other organizations. The Committee
has systematically catalogued these downloaded EMDB data sets, with the files renamed toreflect the source and type of data in the data files. This attachment provides a list of thedownloaded EMDB data sets. The Committee undertook a process of quality assurance,
including extensive checks to determine whether the measurements were scientifically soundand fit for purpose, consistent with the processes undertaken in the preparation of the UNSCEAR
2013 Report.
Notes
The designations employed and the presentation of material in this publication do not imply theexpression of any opinion whatsoever on the part of the Secretariat of the United Nations
concerning the legal status of any country, territory, city or area, or of its authorities, orconcerning the delimitation of its frontiers or boundaries.
Information on Uniform Resource Locators (URLs) and links to Internet sites contained in thepresent publication are provided for the convenience of the reader and are correct at the time ofissue. The United Nations takes no responsibility for the continued accuracy of that informationor for the content of any external website.
© United Nations, March 2022. All rights reserved, worldwide.
This publication has not been formally edited.

Table A-5.1. Data sets downloaded from the Japan Atomic Energy Agency Environment Monitoring Database website at [JAEA, WEB]
Website data set description

Organization(s)Measurement type

Period covered

Fukushima Prefecture
Environmental Radiation
Monitoring-Mesh Investigation(detail survey)

The Fukushima Prefecture Government has continuously been conducting
the Mesh survey with 2 km grids covering the whole Fukushima
Prefecture to understand the distribution of air dose rate in the whole
prefecture after the FDNPS accident. The Fukushima Prefecture
Government conducted detail surveys with grids more detailed than 2 km
grids and released the results to the public. These data were compiled by
JAEA based on the results of Fukushima Prefecture Environmental
Radiation Monitoring in Mesh Survey (detail survey) (from FY 2014 toFY 2016) released to the public in the Fukushima Prefecture Government
website. The JAEA compilation of the original data sets were accessed inAugust 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010118/

Fukushima Prefecture

Ambient dose rate

FY 2014 to FY 2016

Fukushima Prefecture
Environmental Radiation
Monitoring-Mesh Investigation

This series of data was compiled by JAEA based on results of Fukushima
Prefecture Environmental Radiation Monitoring-Mesh Investigation (FY2011 to FY 2017). These data were created based on the results of the
Fukushima Prefecture Environmental Radiation Monitoring in Mesh
Survey (1st to 10th surveys) released to the public in the Fukushima
Prefecture Government website. In these surveys, the whole Fukushima
Prefecture was divided into 4 × 4 km grids and 1 to 6 measurement points
were selected in each grid that includes urban areas and residential areas.
The air dose rates at the height of 1 m and 1 cm were measured. The JAEA
compilation of the original data sets were accessed in August 2018 fromthe JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010117/

The Secretariat of the
Nuclear Regulatory
Authority, and Fukushima
Prefecture

Ambient dose rate

FY 2011 to FY 2017

Air dose rate measurements in theDistribution Survey ofRadioactive SubstancesThis series of data was compiled by JAEA based on results of the air dose
rates measured using NaI(Tl) scintillation survey metres and ionizationchamber type survey metres from FY 2011 to FY 2016 in the Distribution
Survey of Radioactive Substances by the Ministry of Education, Culture,
Sports, Science and Technology, and the Secretariat of the Nuclear
Regulatory Authority. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010116/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Ambient dose rate

FY 2011 to FY 2016

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

3

4

EMDB website data set title

Website data set description

Measurement type

Readings of environmental
radiation monitoring (at hot
springs) in Fukushima Prefecture

Period covered

These data were compiled by JAEA based on the measurement results of
hot springs from the “Readings of environmental radiation monitoring attourist spots in Fukushima Prefecture” released to the public in the
Monitoring Information of Environmental Radioactivity Level portal site
by the Secretariat of the Nuclear Regulatory Authority. The survey was
conducted from July 2011 to August 2017. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1010112000/

Fukushima Prefecture

Ambient dose rate

July 2011 toAugust 2017

Readings of environmental
radiation monitoring (at tourist
spots) in Fukushima Prefecture

These data were compiled by JAEA based on the measurement results of
tourist spots from the “Readings of environmental radiation monitoring attourist spots in Fukushima Prefecture” released to the public in the
Fukushima Prefecture Government website. The survey was conductedfrom July 2011 to August 2017. The JAEA compilation of the original
data sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010111000/

Fukushima Prefecture

Ambient dose rate

July 2011 toAugust 2017

Results of measurement of air
dose rates at fixed observation
points using a monitoring car

These data were compiled by JAEA based on the “Results of measurementof air dose rates at fixed observation points using a monitoring car”
released to the public in the Monitoring Information of Environmental
Radioactivity Level portal site by the Secretariat of the Nuclear
Regulatory Authority. The survey was conducted every day from March2011 to March 2016 at the fixed observation points outside the 20-km zoneof FDNPS. From April 2016, the survey was conducted from September
to October every year. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010110000/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Ambient dose rate

March 2011 to
October 2016

Readings of accumulated dose
outside the 20-km zone of
TEPCO FDNPS (measured bydigital dosimeter)

These data were compiled by JAEA based on the “Readings ofaccumulated dose outside the 20-km zone of TEPCO Fukushima Daiichi
NPS” released to the public in the Monitoring Information ofEnvironmental Radioactivity Level portal site by the Secretariat of the
Nuclear Regulatory Authority. The measured accumulated doses werecollected every day from 25 March 2011 to 31 December 2011. From
January 2012 to March 2016, the measured accumulated doses werecollected once or twice per week. The JAEA compilation of the original
data sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010109000/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Ambient dose rate

March 2011 toMarch 2016

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

Organization(s)EMDB website data set title

Organization(s)Measurement type

Period covered

Readings of accumulated dose
outside the 20-km zone of
TEPCO FDNPS (measured byglass badge dosimeter)

These data were compiled by JAEA based on the “Readings ofaccumulated dose outside the 20 km zone of TEPCO Fukushima Daiichi
NPS” released to the public in the Monitoring Information ofEnvironmental Radioactivity Level portal site by the Secretariat of the
Nuclear Regulatory Authority. The measured accumulated doses werecollected once or twice per week from April 2011 to March 2016. From
April 2016, the measured accumulated doses were collected every threemonths. The JAEA compilation of the original data sets were accessed inAugust 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010108000/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Ambient dose rate

April 2011 to
December 2016

Air dose rate readings inside the
20-km zone of FDNPS

These data were compiled by JAEA based on measurements within a
20-km radius of TEPCO Fukushima Daiichi NPS, available in the
Monitoring Information of Environmental Radioactivity Level, the portalsite run by the Nuclear Regulatory Authority. The survey was conducted
every week from March 2011 to March 2016. In FY 2016, the survey was
conducted in September. Dosimeters which were used: NaI (NaI
scintillator detector) and IC (ionization chamber type survey metre). The
JAEA compilation of the original data sets were accessed in August 2018from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010107000/

Power company

Ambient dose rate

March 2011 to
September 2016

Readings of environmental
radiation level by emergency
monitoring

These data were compiled by JAEA based on the results of“Environmental radiation level by emergency monitoring by Fukushima
Prefecture” released to the public in the Monitoring Information ofEnvironmental Radioactivity Level portal site by the Secretariat of the
Nuclear Regulatory Authority. The data includes air dose rates measured
from March 2011. The JAEA compilation of the original data sets wereaccessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010106000/

Secretariat of the Nuclear
Regulatory Authority

Ambient dose rate

March 2011 toMarch 2016

Readings of accumulated dose by
the Federation of Electric Power
Companies of Japan (member
companies)

These data were compiled by JAEA based on the “Readings of accumulated
dose by the Federation of Electric Power Companies of Japan (member
companies)” released to the public in the Monitoring Information ofEnvironmental Radioactivity Level portal site by the Secretariat of the
Nuclear Regulatory Authority. The accumulated dose measurements wereconducted every week from March 2011 at the fixed observation points
outside the 20-km zone of FDNPS. The JAEA compilation of the original
data sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010105000/

Federation of ElectricPower Companies of Japan

Ambient dose rate

March 2011 toMarch 2016

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

Website data set description

5

6

EMDB website data set title

Website data set description

Organization(s)Measurement type

Period covered

These data were compiled by JAEA based on the results of theenvironmental radiation monitoring for child welfare institutions by
Fukushima Prefecture released to the public in the Fukushima Prefecture
Government website. The survey has been conducted since April 2011.
The JAEA compilation of the original data sets were accessed in August
2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010104000/

Fukushima Prefecture

Ambient dose rate

April 2011 to
September 2017

Survey results of environmental
radioactivity level in the national
forests in Fukushima Prefecture

These data were compiled by JAEA based on the results of theenvironmental radiation monitoring survey in the national forests inFukushima Prefecture released to the public in the Kanto Forest
Management Office. The surveys have been conducted once a year
starting from July 2011. Using survey metres, the measurements wereconducted at the height of 10, 50 and 100 cm from the ground. The JAEA
compilation of the original data sets were accessed in August 2018 fromthe JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010103000/

Fukushima Prefecture

Ambient dose rate

July 2011 toJune 2017

Measurement results of air dose
rates at Tsukuba Center(air dose rates)

These data were compiled by JAEA based on the results of air dose rates
from “The measurement results of air dose rates at Tsukuba Center” thatwas released to the public in the website of the National Institute ofAdvanced Industrial Science and Technology. In this survey, the air dose
rates were obtained at Tsukuba Center from 15 March 2011 to 15 March2013 by subtracting 0.06 µSv/h as background. The JAEA compilation of
the original data sets were accessed in August 2018 from the JAEA EMDB
website athttps://emdb.jaea.go.jp/emdb/en/portals/1010102000/

National Institute ofAdvanced Industrial
Science and Technology

Ambient dose rate

March 2011 toMarch 2013

Results of the monitoring survey
in the restricted areas and planned
evacuation zones

These data were compiled by JAEA based on results of the monitoring
survey in the restricted areas and planned evacuation zones, available in
the Monitoring Information of Environmental Radioactivity Level, theportal site run by the Secretariat of the Nuclear Regulatory Authority. The
basic data were obtained from 400 measurement points each around
Namie station and Tomioka Town. In the wide range monitoring, therestricted areas and planned evacuation zones were divided into 2 × 2 km
grids and measurements were conducted at 20 measurement points in eachgrid. The JAEA compilation of the original data sets were accessed inAugust 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1010101000/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Ambient dose rate

June 2011 toAugust 2011

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

Results of environmental
radiation monitoring for childwelfare institutions

Organization(s)Measurement type

Period covered

Results of air dose rates measured
by route buses in Fukushima
Prefecture (4 buses,
January 2013) – weekly average

These data were compiled by JAEA based on the air dose ratemeasurements using fixed-route buses in Fukushima Prefecture (4 routebuses, from January 2013) released to the public through the JAEA
website. The JAEA compilation of the original data sets were accessed inAugust 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010204/

JAEA

Ambient dose rate

January 2013 toMarch 2015

Vehicle-borne survey conductedby TEPCO

This series of data was compiled by JAEA based on results by vehicleborne surveys in the restricted areas and planned evacuation zones
publicly released in the Ministry of Economy, Trade and Industry. The
JAEA compilation of the original data sets were accessed in August 2018from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010203/

The Ministry of Economy,
Trade and Industry, andTokyo Electric Power
Company

Ambient dose rate

FY 2011 to FY 2017

Vehicle-borne survey in theDistribution Survey ofRadioactive Substances(KURAMA)

This series of data was compiled by JAEA based on the results of thevehicle-borne surveys conducted in the Distribution Survey ofRadioactive Substances by the Ministry of Education, Culture, Sports,
Science and Technology, and the Secretariat of the Nuclear Regulatory
Authority from FY 2011 to FY 2015. The surveys used KURAMA (Kyoto
University RAdiation MApping system) that was inimitably developed by
Kyoto University. The JAEA compilation of the original data sets wereaccessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010202/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Ambient dose rate

FY 2011 to FY 2015

Vehicle-borne survey in theDistribution Survey ofRadioactive Substances(Radi-probe)

This series of data was compiled by JAEA based on the results of thevehicle-borne surveys conducted by the Ministry of Education, Culture,
Sports, Science and Technology in FY 2011 and FY 2012. The
measurement used the Radi-Probe developed by the National Institute ofRadiological Sciences. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010201/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Ambient dose rate

FY 2011 to FY 2012

Unmanned helicopter in theDistribution Survey ofRadioactive SubstancesThis series of data was compiled by JAEA based on measurement resultsof air dose rate of the unmanned helicopter monitoring in the Distribution
Survey of Radioactive Substances conducted by the Ministry of
Education, Culture, Sports, Science and Technology, and the Secretariatof the Nuclear Regulatory Authority from FY 2012 to FY 2015. The JAEA
compilation of the original data sets were accessed in August 2018 fromthe JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010302/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Ambient dose rate

FY 2012 to FY 20157

Website data set description

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

8

Website data set description

Organization(s)Measurement type

Period covered

Airborne dose rate: airborne
monitoring in the Distribution
Survey of Radioactive SubstancesThis series of data was compiled by JAEA based on the measurement
results of the airborne monitoring surveys conducted by the Ministry of
Education, Culture, Sports, Science and Technology, the United States
Department of Energy, and the Secretariat of the Nuclear Regulatory
Authority from FY 2011 to FY 2016. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/b1010301/

The Ministry of Education,
Culture, Sports, Scienceand Technology, theUnited States Departmentof Energy, and theSecretariat of the Nuclear
Regulatory Authority

Ambient dose rate

FY 2011 to FY 2016

Measurement results of air dose
rates nationwide and in
Fukushima Prefecture (real-time
distribution) daily average

This series of data was compiled by JAEA based on the air dose ratemeasurement in whole Japan and Fukushima Prefecture (real-time
distribution system) that is publicly available in the Monitoring
Information of Environmental Radioactivity Level website of the Nuclear
Regulatory Authority. This data converts 1 μGy/h (microgray per hour) =1 μSv/h (microsievert per hour). The JAEA compilation of the original
data sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010403

Secretariat of the Nuclear
Regulatory Authority

Ambient dose rate

FY 2011 to FY 2017

Measurement results of air dose
rates nationwide and in
Fukushima Prefecture (real-time
distribution)

This series of data was compiled by JAEA based on the air dose ratemeasurement in whole Japan and Fukushima Prefecture (real-time
distribution system) that is publicly available in the Monitoring
Information of Environmental Radioactivity Level website of the Nuclear
Regulatory Authority. This data converts 1 μGy/h (microgray per hour) =1 μSv/h (microsievert per hour). The JAEA compilation of the original
data sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1010402/

Secretariat of the Nuclear
Regulatory Authority

Ambient dose rate

FY 2011 to FY 2017

Reading of air dose rate for themonitoring post in Momijiyama(Fukushima City)

These data were compiled by JAEA based on air dose rates from themonitoring post in Momijiyama (Fukushima City), available in the
Monitoring Information of Environmental Radioactivity Level, the portalsite run by the Secretariat of the Nuclear Regulatory Authority.
Instantaneous values were obtained in μGy/h (microgray per hour) and thedata here uses the conversion: 1 μGy/h (microgray per hour) = 1 μSv/h(microsievert per hour). The data included here are 30-minute interval dataobtained from March 2011 to April 2011. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1010401000/

Fukushima Prefecture

Ambient dose rate

March 2011 toApril 2011

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

Website data set description

Organization(s)Measurement type

Period covered

Deposition of gamma-emitting
radionuclides in the Distribution
Survey of Radioactive SubstancesThis series of data was compiled by JAEA based on results of soil
deposition densities of gamma-emitting radionuclides measured from FY
2011 to FY 2015 in the Distribution Survey of Radioactive Substances by
the Ministry of Education, Culture, Sports, Science and Technology, andthe Secretariat of the Nuclear Regulatory Authority. In FY 2011, soil
samples were collected and analysed using a fixed germanium
semiconductor detector. From FY 2012, in-situ measurements werecarried out using portable germanium semiconductor detectors. For areas
with high air dose rates where in-situ measurement was suitable, soil
sample analysis by the fixed germanium semiconductor detector was
conducted as the same manner as FY 2011. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/b1020101/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

FY 2011 to FY 2015

Unmanned helicopter monitoringin the Distribution Survey ofRadioactive SubstancesThis series of data was compiled by JAEA based on measurement resultsof radioactive caesium by the unmanned helicopter monitoring in theDistribution Survey of Radioactive Substances conducted by the Ministryof Education, Culture, Sports, Science and Technology, and theSecretariat of the Nuclear Regulatory Authority from FY 2012 to FY
2016. The JAEA compilation of the original data sets were accessed inAugust 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1020202/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

FY 2012 to FY 2016

Airborne monitoring in theDistribution Survey ofRadioactive SubstancesThis series of data was compiled by JAEA based on the radioactive
caesium deposition density measurement results of the airborne
monitoring survey by the Ministry of Education, Culture, Sports, Scienceand Technology, the United States Department of Energy, and theSecretariat of the Nuclear Regulatory Authority. The JAEA compilationof the original data sets were accessed in August 2018 from the JAEAEMDB website at https://emdb.jaea.go.jp/emdb/en/portals/b1020201/

The Ministry of Education,
Culture, Sports, Scienceand Technology, theUnited States Departmentof Energy, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

FY 2011 to FY 2013

Radioactivity concentration
analysis of iodine in theDistribution Survey ofRadioactive SubstancesThis series of data was compiled by JAEA to study if the deposition
densities of 131I and 129I are correlated, and if the deposition density of 131I
can be derived using the deposition density of 129I and the correlation
between 131I and 129I. The JAEA compilation of the original data sets wereaccessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1020311/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

FY 2011 to FY 2013

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

910

Website data set description

Organization(s)Measurement type

Period covered

Analysis results of plutonium in
the Distribution Survey ofRadioactive SubstancesThis series of data was compiled by JAEA based on results of analysis ofplutonium deposition densities from FY 2011 to FY 2013 in theDistribution Survey of Radioactive Substances by the Ministry of
Education, Culture, Sports, Science and Technology, and the Secretariatof the Nuclear Regulatory Authority. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/b1020310/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

FY 2011 to FY 2013

Results of the monitoring of soil
samples

These data were compiled by JAEA based on the “Readings of dust, soil
and environmental sampling” released to the public in the Monitoring
Information of Environmental Radioactivity Level portal site by the
Secretariat of the Nuclear Regulatory Authority. The JAEA compilationof the original data sets were accessed in August 2018 from the JAEAEMDB website at https://emdb.jaea.go.jp/emdb/en/portals/1020309000/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

March 2011 to
October 2017

Readings of soil monitoring in
20-km zone of TEPCO FDNPS

These data were compiled by JAEA based on the “Readings of dust, soil
and environmental sampling” released to the public in the Monitoring
Information of Environmental Radioactivity Level portal site by the
Secretariat of the Nuclear Regulatory Authority. The JAEA compilationof the original data sets were accessed in August 2018 from the JAEAEMDB website at https://emdb.jaea.go.jp/emdb/en/portals/1020308000/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Grounddeposition density

April 2011 toJanuary 2016

Results of the monitoring ofenvironmental monitoring
samples

These data were compiled by JAEA based on the “Readings of dust, soil
and environmental sampling” released to the public in the Monitoring
Information of Environmental Radioactivity Level portal site by the
Secretariat of the Nuclear Regulatory Authority. The analysis ofenvironmental sample was conducted from March 2011 to September
2016. The JAEA compilation of the original data sets were accessed inAugust 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1020307000/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

March 2011 to
September 2016

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

Website data set description

Organization(s)Measurement type

Period covered

Soil sample results for 89Sr and90
Sr in eastern Japan

This data was compiled by JAEA based on results of soil deposition
densities of 89Sr and 90Sr measured in “The second survey on the
distribution condition of radioactive substances by MEXT due to theaccident at TEPCO’s Fukushima Daiichi NPP”. The JAEA compilation of
the original data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1020306000/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Grounddeposition density

Decay correction:
13 January 2012

Readings from radiation
monitoring of soil in Fukushima
Prefecture

These data were compiled by JAEA based on radiation monitoring of soil
in Fukushima Prefecture, available in the Monitoring Information ofEnvironmental Radioactivity Level, the portal site run by the Secretariatof the Nuclear Regulatory Authority. The purpose was to ascertain thechange of deposition density of radioactive plutonium in the prefecture
before and after the accident. The measurements were conducted for thesoil samples obtained from August to October 2011. The data here was
not converted to Bq/kg dry-soil. The JAEA compilation of the original
data sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1020305000/

Fukushima Prefecture

Grounddeposition density

August 2011 to
October 2011

Readings from radiation
monitoring of soil (dry soil) in
Fukushima Prefecture

These data were compiled by JAEA based on radiation monitoring of soil
in Fukushima Prefecture, available in the Monitoring Information ofEnvironmental Radioactivity Level, the portal site run by the Secretariatof the Nuclear Regulatory Authority. The purpose was to ascertain thechange of deposition density of radioactive plutonium in the prefecture
before and after the accident. The measurements were conducted for thesoil samples obtained from August to October 2011. The data here wasconverted to Bq/kg dry-soil. The JAEA compilation of the original data
sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1020304000/

Fukushima Prefecture

Grounddeposition density

August 2011 to
October 2011

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EMDB website data set title

11

12

Website data set description

Organization(s)Measurement type

Period covered

Results of the nuclide analysis ofsoil sampling at 2,200 locations inFukushima Prefecture andneighbouring prefectures

There was limited information provided on the JAEA EMDB website
regarding this dataset, but it is described in more detail in the UNSCEAR
2013 Report where it was used for the dose assessments for public andnon-human biota in Fukushima Prefecture. JAEA conducted the survey
with cooperation of various universities and research institutes. Ministryof Education, Culture, Sports, Science and Technology (MEXT) was
responsible for the coordination of the measurement data and assessmentof validity [MEXT, web1; MEXT, web2]. Ambient dose equivalent rates
were measured, and soil samples collected from 6 June to 8 July 2011 forareas within 100 km from FDNPS. From FDNPS out to 80 km these were
undertaken on 2 × 2 km grids. Between 80 km and 100 km from FDNPS
they were divided into 10 × 10 km grids. Ambient dose equivalent rates
were measured at a height of 1 m above the ground surface at one locationin each of these divided grids (nearly 2,200 locations in total), and soil
samples were collected at five points at each location. Around 11,000 soil
samples were taken; deposition densities of five gamma-emitting
radionuclides (110mAg, 129mTe, 131I, 134Cs and 137Cs) were measured using
germanium semiconductor detectors. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1020101001/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Grounddeposition density

Decay correction:
14 June 2011

Readings of environmental
radiation level of soil sampling inschools in Fukushima Prefecture

These data were compiled by JAEA based on soil sampling data from theenvironmental radiation level of dust and soil samplings in schools inFukushima Prefecture, available in the Monitoring Information ofEnvironmental Radioactivity Level, the portal site run by the Secretariatof the Nuclear Regulatory Authority. The soil samplings and air dose ratemeasurements were conducted from 5 to 6 April 2011 at schools inFukushima Prefecture. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1020303000/

Fukushima Prefecture

Grounddeposition density

April 2011

Readings of environmental
monitoring (weeds, land waterand land soil) by Fukushima
Prefecture outside the 20-km
radius from Fukushima Daiichi
NPS

These data were compiled by JAEA based on measurement results ofenvironmental monitoring (weeds, land water and land soil) by Fukushima
Prefecture outside the 20-km radius from FDNPS, available in the
Monitoring Information of Environmental Radioactivity Level, the portalsite run by the Secretariat of the Nuclear Regulatory Authority. The
samplings were conducted on 16 and 17 March 2011. The JAEA
compilation of the original data sets were accessed in August 2018 fromthe JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1020302000/

Fukushima Prefecture

Grounddeposition density

March 2011

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

Organization(s)Measurement type

Period covered

Readings of radioactive strontium
in land soil and plant

These data were compiled by JAEA based on analysis results ofradioactive strontium in land soil and plants, available in the Monitoring
Information of Environmental Radioactivity Level, the portal site run by
the Secretariat of the Nuclear Regulatory Authority. The samplings wereconducted on 16, 17 and 19 March 2011. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1020301000/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Grounddeposition density

March 2011

Depth distribution of radioactive
substances in model area soil in
the Distribution Survey ofRadioactive Substances

These data were compiled by JAEA from the results of scraper platesurveys from FY 2011 to FY 2013 to study the changing trend of theconcentrations of radioactive substances in the forest, upland field andgrass land in Yamakiya District Kawamata Town Date County Fukushima
Prefecture. The JAEA compilation of the original data sets were accessedin August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1020405/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

FY 2011 to FY 2013

Depth distribution of radioactive
caesium in soil collected using ascraper plate in the Distribution
Survey of Radioactive Substances

These data were compiled by JAEA from the results of studies of the depth
distribution of radioactive caesium comprehensively mainly within a
80 km radius of FDNPS, based on soil samples collected at various depths
using a scraper plate which is the standard method to measure radioactive
nuclides in soil profiles employed at the International Atomic Energy
Agency and researched the depth distribution of radioactive caesium. The
JAEA compilation of the original data sets were accessed in August 2018from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1020404/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Grounddeposition density

FY 2011 to FY 2016

Depth distribution of radioactive
substances in soil samples from
Namie Town, Kawamata Town,
etc. in the Distribution Survey ofRadioactive Substances

These data were compiled by JAEA from the results of depth distribution
surveys of radioactive substances conducted at the areas including Namie
Town Futaba County, and Kawamata Town Date County Fukushima
Prefecture using a geoslicer and a soil sampler of large diameter. Results
are described as activity per unit soil weight (Bq/kg) and activity per unit
volume (Bq/m3). The JAEA compilation of the original data sets wereaccessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1020403/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Grounddeposition density

FY 2011 to FY 2012

Depth distribution of radioactive
substances sampled in Fukushima
Prefecture and neighbouring
prefectures in the Distribution
Survey of Radioactive SubstancesThis series of data was compiled by JAEA based on results of depth
distribution analysis of radioactive caesium in Fukushima Prefecture andneighbouring prefectures. Soil core samples were collected using an ironpipe. The JAEA compilation of the original data sets were accessed inAugust 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/b1020402/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Grounddeposition density

FY 2011 to FY 201213

Website data set description

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EMDB website data set title

14

Website data set description

Organization(s)Measurement type

Period covered

Results of the measurement of
depth distribution of radioactive
substances in soil in 2 × 2 km
grids southwest of Fukushima
City

This series of data was compiled by JAEA based on results of depth
distribution analysis of radioactive substances in soil for sampling points
located in the southwest of Fukushima City. Sampling points wereselected from three ecosystems with different land uses (agricultural land,grass land and forest) within a 2 × 2 km square. A total of 15 sampling
points of which 6 points were of agricultural land, 4 points of grass landand 5 points of forest were chosen. Radioactivity concentration and error
are reported as decay-compensated values as of 14 June 2011. The JAEA
compilation of the original data sets were accessed in August 2018 fromthe JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1020401000/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Grounddeposition density

Decay correction:
14 June 2011

Reading of environmental
radioactivity level by Prefecture(monthly fallout)

These data were compiled by JAEA based on the “Reading ofenvironmental radioactivity level by prefecture (monthly fallout)”
released to the public in the Monitoring Information of Environmental
Radioactivity Level portal site by the Secretariat of the Nuclear
Regulatory Authority. The data includes measured data from February
2011. The Secretariat of the Nuclear Regulatory Authority compiled thedata reported from each prefecture government and released on thewebsite. The one-month accumulated fallout substances were measured
every month. The JAEA compilation of the original data sets wereaccessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1050106000/

Secretariat of the Nuclear
Regulatory Authority

Radioactivity in
air

February 2011 toJanuary 2015

Readings of dust sampling in
20-km zone of TEPCO FDNPS

These data were compiled by JAEA based on dust radioactivity
concentration measurements within 20km radius of TEPCO FDNPS,
available in the Monitoring Information of Environmental Radioactivity
Level, the portal site run by the Nuclear Regulatory Authority. The
measurement results have been released since April 2011 and subsequent
results are continuously released. The JAEA compilation of the original
data sets were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1050105000/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Radioactivity in
air

April 2011 toJuly 2017

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

Organization(s)Measurement type

Period covered

Readings of detailed monitoringin restricted area and planned
evacuation zone (dust monitoring(radioactivity concentrations in
the air))

These data were compiled by JAEA based on the results of the dust
measurements from “The detailed monitoring in the restricted area andplanned evacuation zone (6th Vehicle-borne Survey and Dust
Monitoring)” that was released to the public in the website of the Ministryof Economy, Trade and Industry. In this survey, measurements ofradioactivity concentration in the air were conducted in Tomioka town thatwas located within the 20-km range of FDNPS. The 134Cs and 137Cs in the
air were measured at two measurement points including the area close to
the forest and the city centre in Tomioka Town. The JAEA compilation of
the original data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1050104000/

Ministry of Economy,
Trade and Industry

Radioactivity inairAugust 2011 toMarch 2012

Reading of environmental
radioactivity level by Prefecture(fallout)

These data were compiled by JAEA based on the daily fallout monitoring
results by prefectures from March 2011 to December 2011 in the “Readingof environmental radioactivity level by prefecture (fallout)” released to the
public in the Monitoring Information of Environmental Radioactivity
Level portal site by the Secretariat of the Nuclear Regulatory Authority.
The fallout substances were collected with a precipitation collector andmeasured using a germanium semiconductor detector. The JAEA compilationof the original data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1050103000/

The Ministry of Education,
Culture, Sports, Scienceand Technology, and theSecretariat of the Nuclear
Regulatory Authority

Radioactivity in
airMarch 2011 to
December 2011

Readings of dust sampling by theFederation of Electric Power
Companies of Japan (member
companies)

These data were compiled by JAEA based on the “Readings of dust
sampling by the Federation of Electric Power Companies of Japan(member companies)” released to the public in the Monitoring
Information of Environmental Radioactivity Level portal site by the
Secretariat of the Nuclear Regulatory Authority. The sampling of dust was
conducted from March 2011 to July 2011 for six points outside the 20-km
zone of TEPCO FDNPS. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1050102000/

Electric Power Companies
of JapanRadioactivity in
airMarch 2011 toJuly 2011

Readings of environmental
radiation level of dust sampling inschools in Fukushima Prefecture

These data were compiled by JAEA based on dust sampling data from theenvironmental radiation level of dust and soil samplings in schools inFukushima Prefecture, available in the Monitoring Information ofEnvironmental Radioactivity Level, the portal site run by the Secretariatof the Nuclear Regulatory Authority. The dust samplings and air dose ratemeasurements were conducted from 5 to 6 April 2011 at schools inFukushima Prefecture. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1050101000/

Fukushima PrefectureRadioactivity in
air

April 201115

Website data set description

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EMDB website data set title

16

Website data set description

Organization(s)Measurement type

Period covered

Readings of environmental
radioactivity levels measured by
Fukushima Prefecture (fallout)

These data were created based on the “Reading of environmental
radioactivity level measured by Fukushima Prefecture (fallout)” released
to the public in the Monitoring Information of Environmental
Radioactivity Level portal site by the Secretariat of the Nuclear
Regulatory Authority. The survey has been conducted since December
2011 at the Environmental Radioactivity Monitoring Center ofFukushima, Fukushima Branch. The accumulated daily fallout substance
was measured every day using a germanium semiconductor detector. The
JAEA compilation of the original data sets were accessed in August 2018from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1050201000/

Fukushima PrefectureRadioactivity inair

December 2011 toMarch 2014

Drinking water results measured
by Environmental Radioactivity
Monitoring Center of Fukushima,
Fukushima Branch

These data were compiled by JAEA based on the radioactivity
concentration measurement for drinking water conducted by theEnvironmental Radioactivity Monitoring Center of Fukushima,
Fukushima Branch (in Fukushima Hokida jinai) released to the public in
the Fukushima Prefecture Government website. The JAEA compilation of
the original data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/b1040105/

Fukushima Prefecture

Activity
concentrations infood and water

FY 2011 to FY 2016

Measurement results ofradioactivity concentrations in thedrinking water by watersuppliers/local governments
conducted by the Nuclear
Regulatory Authority (MEXT till
April 2013) and 10 prefecturesnear Fukushima Prefecture(Miyagi, Yamagata, Niigata,
Ibaraki, Tochigi, Gumma,
Saitama, Tokyo, Kanagawa andChiba Prefecture)

These data were compiled by JAEA based on the measurements ofradioactivity concentrations in the drinking water by water suppliers/local
governments conducted by the Nuclear Regulatory Authority (MEXT till
April 2013) and 10 prefectures near Fukushima Prefecture (Miyagi,
Yamagata, Niigata, Ibaraki, Tochigi, Gumma, Saitama, Tokyo, Kanagawa
and Chiba Prefecture) released to the public in the Ministry of Health,Labour and Welfare website. The measurements have been conductedsince March 2011 in 10 prefectures near Fukushima Prefecture. The JAEA
compilation of the original data sets were accessed in August 2018 fromthe JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040104000/

Ministry of Health, Labourand Welfare

Activity
concentrations infood and water

March 2011 to
September 2014

Readings of radioactivity level indrinking water by prefecture

These data were compiled by JAEA based on the results of drinking water(tap water) monitoring released to the public in the Secretariat of the
Nuclear Regulatory Authority website. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1040103000/

Secretariat of the Nuclear
Regulatory Authority

Activity
concentrations infood and water

March 2011 toJuly 2014

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

Website data set description

Organization(s)Measurement type

Period covered

Results of radiation monitoring of
tap water

These data were compiled by JAEA based on the measurement results of
tap water and raw water including river water from March 2011 to March2014 from the “Results of radiation monitoring of tap water” released tothe public in the Ibaraki Prefecture Government website. The JAEA
compilation of the original data sets were accessed in August 2018 fromthe JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040102000/

Ibaraki Prefecture

Activity
concentrations infood and water

March 2011 toMarch 2014

Results of the radionuclide
analysis of well water sampledfrom wells in Fukushima
Prefecture

These data were compiled by JAEA based on results of the nuclide
analysis of well water sampled from wells in Fukushima Prefecture from
July 2011 to August 2011. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040101000/

The Ministry of Education,
Culture, Sports, Scienceand Technology

Activity
concentrations infood and water

July 2011 toAugust 2011

Measurement results ofradioactivity concentration infood products in Fukushima
Prefecture

These data were compiled by JAEA based on the measurement results offood products released to the public in the Fukushima Prefecture
Government website. The JAEA compilation of the original data sets wereaccessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040202000/

Fukushima Prefecture

Activity
concentrations infood and water

March 2011 toMarch 2018

Monitoring information for the
agricultural, forest and fisheryproducts in Ibaraki Prefecture

These data were compiled by JAEA based on the “Monitoring information
for the agricultural, forest and fishery products” released to the public in
the Ibaraki Prefecture Government website. The JAEA compilation of theoriginal data sets were accessed in August 2018 from the JAEA EMDB
website at https://emdb.jaea.go.jp/emdb/en/portals/1040201000/

Ibaraki Prefecture

Activity
concentrations infood and water

March 2011 toJanuary 2018

Measurement results of the test
operation fish catches

These data were compiled by JAEA based on the measurement results of
the “test operation fish catches” released to the public in the Fukushima
Prefectural Federation of Fisheries Co-operative Associations website.
The JAEA compilation of the original data sets were accessed in August
2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040302000/

Fukushima Prefectural
Federation of Fisheries
Co-operative Associations

Activity
concentrations infood and water

September 2012 toFebruary 2018

Monitoring results of strontium infisheries products conducted by
Fisheries Research Agency

These data were compiled by JAEA based on the radioactivity
concentration measurements of fisheries products for strontium released
to the public in the Ministry of Agriculture, Forestry and Fisheries website.
The JAEA compilation of the original data sets were accessed in August
2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040301000/

Fisheries Agency –Ministry of Agriculture,
Forestry and Fisheries

Activity
concentrations infood and water

April 2011 to July
2017

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

17

18

Website data set description

Organization(s)Measurement type

Period covered

Measurement results ofradioactivity concentration in riceproduced in FY 2011

These data were compiled by JAEA based on the “Measurement results ofradioactivity concentration in rice produced in FY 2011” released to the
public in the Ministry of Agriculture, Forestry and Fisheries website. The
JAEA compilation of the original data sets were accessed in August 2018from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040401000/

Ministry of Agriculture,
Forestry and Fisheries

Activity
concentrations infood and water

August 2011 toNovember 2011

Radiation monitoring survey
results of wild birds and animals

These data were compiled by JAEA based on the radioactivity
concentration measurement results released to the public in the Fukushima
Prefecture government website about the wild birds and animals captured
in Fukushima Prefecture. The JAEA compilation of the original data sets
were accessed in August 2018 from the JAEA EMDB website athttps://emdb.jaea.go.jp/emdb/en/portals/1040501000/

Fukushima Prefecture

Activity
concentrations infood and water

May 2011 toMarch 2018

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

EMDB website data set title

ANNEX B, ATTACHMENT A-5: DATA SETS DOWNLOADED …

19

REFERENCES
JAEA. Database for radioactive substance monitoring data. Japan Atomic Energy Agency.
[Internet] Available from (https://emdb.jaea.go.jp/emdb/en/) on 17 February 2020. 1
MEXT. Radiation dose distribution. Ministry of Education, Culture, Sports, Science andTechnology. [Internet] Available from (http://ramap.jmc.or.jp/map) on 14 September
2020. WEB1. (Japanese).
MEXT. Results of analyses of radionuclides (Cs-134 and Cs-137) in soil. Ministry of Education,
Culture, Sports, Science and Technology. [Internet] Available from(https://www.mext.go.jp/b_menu/shingi/chousa/gijyutu/017/shiryo/__icsFiles/afieldfile/
2011/09/02/1310688_1.pdf) on 14 September 2020. WEB2. (Japanese).
UNSCEAR. Sources, Effects and Risks of Ionizing Radiation. Volume I: Report to the General
Assembly and Scientific Annex A. UNSCEAR 2013 Report. United Nations ScientificCommittee on the Effects of Atomic Radiation. United Nations sales publication
E.14.IX.1. United Nations, New York, 2014.

1

Later updated to https://emdb.jaea.go.jp/emdb_old/en/