AmiMoJo (196126) writes "Experts from the National Institute of Advanced Industrial Science and Technology studied the cost of decontamination for the Fukushima Daiichi nuclear accident, estimating it at $50 billion. They estimate that decontamination in no-entry zones will cost up to 20 billion dollars, and in other areas, 31 billion dollars. It includes the cost of removing, transporting and storing radioactive waste such as contaminated soil. The central government has so far allocated about 11 billion dollars and the project is already substantially behind schedule.
Meanwhile the effectiveness of the decontamination is being questioned. NHK compared data from before and after decontamination at 43 districts in 21 municipalities across Fukushima Prefecture. In 33 of the districts, or 77 percent of the total, radiation levels were still higher than the government-set standard of one millisievert per year. In areas near the Fukushima Daiichi nuclear plant, where decontamination has been carried out on an experimental basis, radiation levels remain 10 to 60 times higher than the official limit."