Annual Change Chart

Condition Selection

Using data registered to the Environmental Radiation Database, you can create charts in which radioactivity concentration is plotted against time (year).
You can easily create a chart by simply following the instructions displayed on your screen.
Counting of applicable data starts once you made selections for all mandatory items.

Click or tap here for FAQ about how to read annual change charts

Reference ItemMandatory

Please select the item you want to display measurement results for. You can compare results among multiple survey regions, or show measurement results for multiple samples or nuclides in one chart.

Reference Item

Survey RegionMandatory

Please select the prefectures to search.

Survey Region
  • Hokkaido & Tohoku
  • Kanto
  • Chubu
  • Kinki
  • Chugoku
  • Shikoku
  • Kyushu & Okinawa

Survey PeriodMandatory

Please specify the period of survey to search.

Year : Month : to Year : Month :

Survey SampleMandatory

Please select a sample (category) to search.
Once you select a sample (category), a list of samples (subcategory) will be shown, where you can select multiple samples (subcategory).

sample (category)

samples (subcategory)

Survey NuclideMandatory

Please select one radionuclide type to search.

Survey Nuclide
Deselect All

This does not have to be selected

Concentration UnitMandatory

Please select the unit of the data to show on the chart.

Concentration Unit

Display MethodMandatory

Please select how to display the chart.

Display Method

Surveys to Use in Your SearchOptional

You can select surveys to use in your search. If no selection is made, all surveys will be included in the search.
For the details of the surveys, see List of Survey Details.

Surveys to Use in Your Search
  • General environment

  • Nuclear facilities

  • Nuclear powered warships