http://mdn.mainichi.jp/features/news/20110723p2a00m0na011000c.htmlJuly 24, 2011
Utility companies across the country continue to tout the low cost of nuclear energy on their websites.
Tohoku Electric Power Co. boasts nuclear power's economic efficiency, while Hokkaido Electric Power Co (HEPCO) the stability of its cost. Each site comes with bar graphs indicating the cost of generating power through various power sources, and the figures are exactly the same regardless of the utility. For every kilowatt-hour of power generated, hydroelectricity is listed as costing 11. 9 yen, petroleum 10.7 yen, liquefied natural gas 6.2 yen, coal 5.7 yen, and nuclear 5.3 yen.
In a section of its website responding to questions sent in by elementary school children, Chubu Electric Power Co. informs us that nuclear power "is the cheapest." The media, including the Mainichi, have often cited the information provided to us by power companies.
However, Kenichi Oshima, a professor of environmental economics and policy at Ritsumeikan University, has done some calculations and has reached a completely difference conclusion. Oshima says that the cost for a kilowatt-hour of electrical power between fiscal 1970 and fiscal 2007 was 10.68 yen for nuclear, 3.98 yen for hydroelectric, and 9.9 yen for thermal generation, with nuclear-generated power coming out as the most expensive. These calculations were even presented at a meeting of the government's Atomic Energy Commission last September. So how does one explain these two different conclusions?
First of all, there is a huge gap between estimates given by power companies and figures derived from actual records.