U.S. Department of Defense releases 3/12/2011 to 5/11/2011 estimates for radiation exposure in Japan

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About this Registry

About this Registry

The Department of Defense (DOD) began establishing the Operation Tomodachi Registry following the devastating March 11, 2011 earthquake and tsunami in Japan. These unfortunate events caused severe damage to the Fukushima Daiichi Nuclear Power Station, which resulted in the release of radiation into the environment. This Registry will include the names of nearly 70,000 DOD-affiliated individuals who were on or near the mainland of Japan during the period from March 12, 2011 to May 11, 2011 along with radiation exposure estimates for each of these individuals.

The Operation Tomodachi Registry is being completed in phases. This website provides radiation exposure estimates for 13 different shore-based locations. Those locations were selected since most of the members of the DOD-affiliated population resided on or near the 13 DOD installations in Japan or in the cities represented.

Final radiation dose estimates are expected to be available by the end of 2012. These estimates may include updates to dose estimates for shore-based locations as well as dose estimates for U.S. Navy ships located off the mainland of Japan during the March 12 through May 11, 2011 timeframe. By the end of 2012, radiation doses are also expected to be available for upwards of 8,000 individuals who had their external or internal radiation measured directly.

Due to privacy concerns, individuals will be unable to link directly to the Registry through this website, but they will be able to learn more about the event that ultimately led to establishing this registry, obtain location-based radiation dose estimates, and contact the Registry administrators to obtain answers to their questions.

Location-Based Radiation Dose Estimates

This page provides interested individuals with location-based radiation dose estimates for adults and children for the period of greatest potential exposure, from March 12, 2011 through May 11, 2011.

To obtain a location-based, radiation dose estimate report, click on the "Dose Information Available" icon closest to where you or your family members were located for the majority of the time during the March 12 through May 11, 2011 timeframe, and then select the appropriate exposure category. Alternatively, you may click the "Table View" button to view the location-based radiation dose estimates in tabular format.

Location-Based Radiation Dose Estimates

The link above will take you to a map that has the following estimates per location (Remember these doses are targeted towards U.S. military personnel. Estimates might be different for other populations):

• Adult
• Child: birth to 1 year
• Child: >1 year to 2 years
• Child: >2 years to 7 years
• Child: >7 years to 12 years
• Child: >12 years to 17 years

Operation Tomodachi