- This choropleth map displays the detection rates (proportion of the total number of tests per year which exceeds the maximum limit) for the municipalities in 10 class color scale.
- The detection rates of radioactive iodine above the maximum limit were only calculated for the municipalities that made 10 or more tests.
- Based on the provisional regulation value under the Food Sanitation Act, samples of which the radioactive iodine concentration was 300 Bq/kg or more were determined to be in excess of reference value.