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Latest Update
(What’s New?)

September 6, 2011
We published this website, “Survey of Fukushima Soil Radioactivities”.

September 19, 2011
The Maps of Dose Rates at 1 m height is now open to the public. You are now able to check the dose rates estimated for 5 years after this survey was conducted.
The dose rates estimated for 10 and 30 years later will be available soon

September 29, 2011
The doses rates estimated for 10 and 30 years later are now available on the Maps of Dose Rates.
A summary of the estimated dose rates are now available.
The results measured by the aircraft monitoring are now available.

October 8, 2011
Updated

December 11, 2011
A correction on the possible number of das you can stay annually was made (based on situations where you are outside for 24 hours/day).
The Maps of Dose Rates in unit of "uSv/day" have now been changed to those "uSv/year".

June 4, 2012
An English version of "Survey of Fukushima Soil Radioactivities" was published.

Website Administrator : Takeshi Ota

About this website

This website shows the data collected by Environment Monitoring Team of Emergency Operation Center (EOC) of Ministry of Education, Culture, Sports, Science and Technology, Japan under the “Creating Radioactive Contamination Map Project” conducted around Fukushima No.1 nuclear power plant.

The soil survey's gamma-ray radiation measurements were conducted ub July and August, 2011, on soil samples collected in June and July, 2011, with the cooperation of many scientists in Japan.
Osaka university and the Japan Atomic Energy Agency (JAEA) played a key of role in the collection of the soil samples. 409 scientists from 94 academic research institutions, and 3 private enterprises participated.
The university of Tokyo and Japan Chemical Analysis Center greatly contributed to gamma-ray measurements of the soil radioactivities.
340 scientists from 21 institutions collaborated for the gamma-ray measurements.

We could not perform this survey project without cooperation of researchers who kindly spent a great deal of time regardless of their important own reserch. With their dedicatedm, it became possible us to collect and measure over 10,000 samples from approximately 2,200 locations in a short period time.

We would like to express our gratitude and appreciation to all those involved for their cooperation in this survey.
At present, some of the data are still being analyzed, and as yet have not been available to the public.
However, we are planning to make them available as soon as they are completed.
We would like present this information to public as soon as possible because it is considered important to the public interest.

We will continuously put our efforts to update this website as soon as.

Also, the MEXT’s announcement is on the links below.
http://radioactivity.mext.go.jp/ja/distribution_map_around_FukushimaNPP/0002/5600_080218.pdf 
http://radioactivity.mext.go.jp/ja/distribution_map_around_FukushimaNPP/0002/11555_0830.pdf　
And, other related information is provided on the website for radioactive contamination monitoring by MEXT.

The person takes full responsibility for the wording and content of this article:
Isao Tanihata
Research Center for Nuclear Physics, Osaka University