Monitoring posts in Shinjuku, Ota, Adachi, Hachioji and Chofu have been established at the request of the Ministry of Education, Culture, Sports, Science and Technology.

Monitoring posts in Edogawa and Kodaira have been established by the Tokyo Metropolitan Government’s Bureau of Social Welfare and Public Health, and the one in Koto by the Industrial Technology Research Institute.

Only the monitoring post in Shinjuku has been collecting data since before the Great East Japan Earthquake.