

A portable electric fan is placed on a bookcase at the Environment Ministry in Tokyo May 1, 2012, on the kick-off day of Cool Biz which allow workers at government offices to take off their ties and roll up their sleeves as the air conditioners are turned down to save power and office temperatures go up. Kim Kyung-Hoon/Reuters
Ministry workers sport a relaxed look as they leave their offices in Tokyo as the government's 'Cool Biz' casual wear campaign is launched on May 1, 2012. The Cool Biz encourages workers to dress down while turning down air conditioners to set office temperatures at 28 degrees Celsius (82.4 degrees Fahrenheit). Koji Sasahara/AP
People walk at a passageway of the Tokyo railway station, dimmed to conserve electricity, on May 1, 2012. Japan shuts down its last working nuclear power reactor the first weekend of May 2012, just over a year after a tsunami scarred the nation, sharpening the battle lines between those who say atomic power is necessary for economic growth and those who argue the quake-prone nation should seize this opportunity to stay nuclear free. Kim Kyung-Hoon/Reuters
Employees of SMBC Nikko Securities Inc. work using only LED desk lights, during daytime at the company office in Tokyo in June, 2011, a day before a target to cut electricity use by 15 percent in regions affected by Japan's March 11 earthquake and tsunami took effect. Toru Hanai/Reuters
Wind turbines stand along the 31-mile-long Sadamisaki Peninsula in Ehime Prefecture, western Japan. Another long, stupefyingly hot summer is looming for Japan just as it shuts down its last operating nuclear power reactor, worsening a squeeze on electricity and adding urgency to calls for a green energy revolution. Hiroshi Otabe/AP
Solar panels cover the 11-hectare compound of the Ukishima Solar Power Station in Kawasaki near Tokyo. The new plant, jointly run by Tokyo Electric Power Co. (TEPCO) and Kawasaki City, generates enough electricity to fulfill the consumption of 2,100 households. Itsuo Inouye/AP
An employee of Tokyo Electric Power Company walks at TEPCO's Kawasaki Thermal Power Plant in Kawasaki, south of Tokyo. Japan is set to have no nuclear power for the first time in over 40 years following last year's crisis at the Fukushima Daiichi nuclear plant, which crushed public trust in nuclear power and prevented the restart of reactors shut for regular maintenance checks. Toru Hanai/Reuters
The Kansai Electric Power Co's Ohi nuclear power plant No. 3, right, and No. 4 reactors are seen in Ohi, Fukui prefecture, western Japan. Japan is facing a power crunch as the last of the country's 54 operating reactors goes offline in May. Shizuo Kambayashi/AP/File
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. Kyodo News/AP
Mourners in protective suits and masks gather for prayers for their beloved ones who were killed in last year's earthquake and tsunami, inside the contaminated exclusion zone near the crippled Fukushima Dai-ichi nuclear power plant, in Okuma, Fukushima prefecture, Japan, March 11, 2012. Kyodo News/AP
The Unit 4 reactor building of the tsunami-crippled Fukushima Dai-ichi nuclear power station is seen through a bus window in Okuma town, north of Tokyo, on Nov. 2011. David Guttenfelder/AP
Storage tanks for radiation-contaminated water are seen in the compound of the tsunami-crippled Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, Japan, in March, 2012. Kyodo News/AP
Costumed protesters shout slogans outside Tokyo Electric Power Company during an anti-nuclear demonstration in Tokyo, March 11, 2012. Japan marked the first anniversary of the earthquake and tsunami which devastated the northeast Japan cities and triggered a massive accident of Fukushima nuclear power plant, run by TEPCO. Junji Kurokawa/AP
Policemen enforce a roadblock at the 20 kilometer mark - the exclusion zone away from the nearby nuclear reactor - on June 20. The TEPCO Fukushima Daiichi nuclear reactor started leaking radiation into the surrounding area after the March 11 earthquake and tsunami damaged the plant. Melanie Stetson Freeman/Staff
The small town of Itate, Japan, is a ghost town on June 20, 2011. It is within the 20-to-30-kilometer zone from the TEPCO Fukushima Daiichi nuclear reactor that started leaking radiation into the surrounding area after the March 11 earthquake and tsunami damaged the plant. Radiation levels in the town are much higher than surrounding areas. Evacuation was initially voluntary, but soon will be mandatory. Melanie Stetson Freeman/Staff
Yai Igari, 91, reads a newspaper in a shelter in Tomioka village, Fukushima prefecture, Japan, on June 19. People have been living in the shelter since being evacuated from their homes, which are within the 10-kilometer exclusion zone, near the Fukushima-Daiichi nuclear power plant that was heavily damaged by the March 11 earthquake and tsunami. Melanie Stetson Freeman/Staff
Young girls do each other's hair in a shelter in Tomioka village, Fukushima prefecture, Japan, on June 19. Melanie Stetson Freeman/Staff
During a press conference, special indoor sandals with nuclear symbols on top wait for use in the room where foodstuffs are tested for radioactivity at the Agriculture Center of Fukushima in Tomioka village, Fukushima prefecture, Japan. Melanie Stetson Freeman/Staff
At the Agriculture Center of Fukushima in Tomioka village, Fukushima prefecture, which is within the 20-30 kilometer zone near the nuclear power plant, journalists are scanned for radioactivity before entering the food-testing area. Melanie Stetson Freeman/Staff
At the Agriculture Center of Fukushima in Tomioka village, Fukushima prefecture, scientists from the local Agriculture, Forestry and Fisheries Department hold a press conference to demonstrate the preparation of food samples - in this case asparagus - for radioactivity tests. Melanie Stetson Freeman/Staff
At the Agriculture Center of Fukushima, Takechi Seiichi demonstrates how to use a machine that detects radioactivity in foodstuffs - in this case a sample of asparagus. They can test 80 samples per day in four machines. Melanie Stetson Freeman/Staff
Dairy and cattle farmers Mineko Okubo and her husband, Moto, live about 30 kilometers from the TEPCO Fukushima Daiichi nuclear reactor that is leaking radiation into the surrounding area. They couldn't sell the milk after the March 11 earthquake and tsunami damaged the nearby nuclear plant - but now have been allowed to do so as radiation levels have dropped. Melanie Stetson Freeman/Staff
A mother shops with her young children in a grocery store in Date, near the Fukushima-Daiichi nuclear power plant on June 19. The store is fully stocked of dairy products. Melanie Stetson Freeman/Staff