FAQ

QHow are radiation doses being measured?
AAir dose rates are measured at 4,383 locations throughout Japan (3,626 locations in Fukushima Prefecture), and measurements are published in real-time every 10 minutes on a government agency's website.

Following the accident at the nuclear power station, based on the Comprehensive Radiation Monitoring Plan that was prepared by the central government and Fukushima Prefecture (decided on August 2, 2011, last revised on April 1, 2020), radiation has been monitored in soil, water, atmosphere, wild flora and fauna, farmland and foods.

Air dose rates are measured using portable monitoring posts and real-time radiation measurement systems, etc. at 4,383 locations throughout Japan (3,626 locations in Fukushima Prefecture) (as of September 2020), and measurement results are posted online in real-time every 10 minutes under "Monitoring information of environmental radioactivity level" (Nuclear Regulation Authority).
(Concerning aircraft monitoring of radioactive materials, see Q "Has most of Japan been contaminated with radiation?").