Three reactors, from left, No. 1, No. 2 and No. 3, are seen at the Tomari Nuclear Power Plant, operated by Hokkaido Electric Power Co., in Tomari, Japan's northernmost main island of Hokkaido. Japan will be free of atomic power for the first time since 1966 on Saturday, May 5, when the Tomari No. 3 reactor, the last of its 50 usable reactors, is switched off for regular inspections.