The Japanese government
"For instance, the Japanese government evacuated the 20-kilometer around the plant and stopped cultivation of crops whose radiation exposure exceeded a certain threshold."
The farmers' crops that were banned were then brought to the city and sold at markets by the farmers themselves to citizens who felt they needed to support the farmers and not the government who banned them. How does this study account for those purchases? We were told that even if we ingested foods that were contaminated, the level of contamination would be insignificant. The Japanese government responded too slowly to the disaster. It was all face until they realized people were in serious danger.