Most observers now believe it will take several decades to clean up the accident at Tokyo Electric Power Company’s Fukushima Daiichi nuclear power station which took place in the wake of the Great East Japan Earthquake.”Impact to last Decade or more if Existing Nuclear Plants Ceasing“, we estimated it would reach 5.7 to 20 trillion yen over the next ten years. Based on this estimate, we have calculated the estimated cost of electric power generation from nuclear plants. By fiscal year 2020 (April 1,2020-March 31,2021), the generation cost of 1 kilowatt hour (kWh) of electric power from nuclear plants could reach 17yen, or about three times that of pre-accident levels (5.4yen-6.4yen). These results make it difficult to argue that nuclear energy has any cost advantages over renewable forms of energy, such as wind power.