The Environment Ministry has decided to decontaminate areas where people could be exposed to radiation of 5 millisieverts or more per year by removing up to 28.78 million cubic meters of radioactively contaminated soil in Fukushima and four other adjacent prefectures affected by the ongoing crisis at the Fukushima No. 1 Nuclear Power Plant.
As a result, if 100 percent of the designated areas were to be decontaminated, the amounts of radioactive soil and other materials to be removed would reach 28.785 million cubic meters, which would fill the Tokyo Dome stadium 23 times. Of the estimated total amounts of soil and other materials to be removed, 1.02 million cubic meters comes from residential and urban areas, 17.42 million cubic meters from farmland, and 8.75 million cubic meters from forests. The total area is 2,419 square kilometers, which is equal to about 17 percent of Fukushima Prefecture.
・Japanese version at 除染：被ばく年５ミリシーベルト超で対象に 環境省方針