Reading of environmental radioactivity level by prefecture [13; 00 May 27, 2011]
4-3-2-4 Radiation survey of environment
Distribution map of radioactivity in the marine soil around TEPCO Fukushima Daiichi Nuclear Power Plant (Converted as dry soil) (Sampling Date: Jan 5, 2015)
Seawater radioactivity near TEPCO Fukushima Daiichi Nuclear Power Plant (Sampling Date: Mar 25, 2015)
Readings at Reading Points out of 20 km zone of TEPCO Fukushima Daiichi Nuclear Power Plant
Estimated and measured 1m height environmental radioactivity level at monitoring posts in 47 prefectures (Monitoring Date: Mar 26, 2015)
Distribution map of seawater radioactivity around coast of Ibaraki Prefecture (Sampling Date: Mar 11, 12, 13, 14, 2015)
Distribution map of radioactivity concentration in the seawater around TEPCO Fukushima Daiichi Nuclear Power Plant (Sampling Date: Feb 16, 17, 23, 24, 25, 2015)