Abstract: “One of the serious fears for Japanese society is contamination of radioactive substances due to the huge earthquake and subsequent Fukushima No. 1 nuclear power plant disaster.This paper proposes a detection method to identify contamination sources of radioactive substances in the air based on open data, which are composed of air dose rate, amount of rain, wind speed, and direction. To select an appropriate area for analyzing contamination sources with this method, a field investigation is conducted in the west part of Japan, which is in a region approximately one thousand km from the east power plant. Based on the possible contamination origin found in the investigation, open data are analyzed by the method in terms of relationship between air dose rate and weather conditions. Air dose rate is observed on each public monitoring point. The nearest weather observation station for each public monitoring point concerning air dose rate is also identified to analyze the relationship between”

Keywords: open data, radioactive substance, local society, weather condition, location information