The document summarizes radiation monitoring and consequences from the Fukushima Nuclear Accident in Japan on April 12, 2011. It provides data on gamma dose rates across 7 prefectures from March 24 to April 12 and across 47 prefectures on April 11. It also gives daily deposition levels of radioactive isotopes I-131 and Cs-137 from April 1 to 11. Monitoring of drinking water, foodstuffs, and other samples found radiation levels were far below restriction levels across prefectures, with one village issuing precautions for infants based on detected I-131 levels.

2. Gamma Dose Rate in 7 Prefectures 24 March – 12 April

3. Gamma Dose Rate in 47 Prefectures on 11 April Natural background: 0.1µSv/h Fukushima prefecture: 2.1 µSv/h

4. Daily deposition of I-131 (Bq /m 2 ) 1 to 11 April

5. Daily deposition of Cs-137 (Bq /m 2 ) 1 to 11 April

6. IAEA measurements Route A: North to North West from F-NPP Gamma dose rate (µSv/h)

7. IAEA measurements Route A: North to North West from F-NPP Beta + gamma contamination (MBq/m 2 )