The high-water mark from the March 11 tsunami is visible on a wall and clock in Ishinomaki, Miyagi Prefecture, northeastern Japan, on Saturday, April 16, 2011. The water in many places along Japan's northeastern Pacific coast struck by tsunami rose above head level, and everything below the waterline was destroyed or left covered by mud. #

This combination photo shows a sequence of images (left to right, top to bottom) of the March 11 earthquake-triggered tsunami sweeping away aircraft and vehicles as it hit Sendai airport in northern Japan, in still images taken from video footage from the Japanese Coast Guard released April 28, 2011. #

A new student waits for his parents after a entrance ceremony at Kamaishi elementary school in Kamaishi, Iwate prefecture, after the area was devastated by the March 11 earthquake and tsunami, April 20, 2011. Nineteen new students took part in the entrance ceremony which was held 13 days late due to the earthquake. #

Workers construct temporary housing units for survivors of the March 11 earthquake and tsunami in Minamisanriku, Miyagi prefecture, Japan, on Wednesday, on April 27, 2011. #

Policemen carry the body of a victim found amid the rubble in Rikuzentakata, Iwate prefecture, more than one month after the area was devastated by a 9.0 magnitude earthquake and tsunami, April 18, 2011. #

Cherry blossoms and other flowers are seen at the Hanamiyama park in Fukushima, northeastern Japan on April 18, 2011. The prefecture's once-vibrant tourism industry is feeling the fallout of recent disasters. Along with the direct economic hit, farmers and businesses face so-called "fuhyo higai," or damages stemming from the battered reputation of the Fukushima brand. #

Mt. Azuma-Kofuji reveals what people call the "white rabbit" on its side as the snow melts in Fukushima, Fukushima Prefecture, northeastern Japan on Sunday, May 1, 2011. The rabbit is a symbol of the coming spring. #

Wakana Kumagai, 6, waits for her mother Yoshiko after visiting the grave of her father, who was killed by the March 11 tsunami, at a temporary mass grave site in Higashi-Matsushima, Miyagi prefecture, April 21, 2011, after attending an entrance ceremony of Omagari elementary school. #

Wakana Kumagai prays with her mother Yoshiko and brother Koki in front of the grave of her father, who was killed by the March 11 tsunami, at a temporary mass grave site in Higashi-Matsushima, Miyagi prefecture, April 21, 2011. Her father, Kazuyuki, called his wife Yoshiko just after the March 11 earthquake to tell her to take the children to Omagari elementary school which was serving as a shelter. He was found near the shelter four days after the tsunami, Yoshiko said. #

Electricity Generating Authority of Thailand (EGAT) officials remove a diesel electric generator at Nong Jok power plant in Bangkok, Thailand, on April 27, 2011, before preparing it to be shipped to Japan. Tokyo Electric Power Co (TEPCO) requested last month to borrow Thailand's power generators for at least 3-5 years to ease Japan's power shortage caused by devastation from March 11's earthquake and tsunami. #

Sakoji Hunayama, 77, poses for a photo in front of his house being dismantled in the area devastated by the March 11 earthquake and tsunami in the port town of Kesennuma, Iwate Prefecture, Japan, on Wednesday, April 20, 2011. #

US and Japanese soldiers prepare to clear debris left by the March 11 earthquake and tsunami from the tracks around Rikuzenono Station in Higashimatsushima, Miyagi Prefecture, on April 24, 2011. Some 60 US and 30 Japanese soldiers took part in the clean up "Operation Soul Train." #

This Saturday May 7, 2011 image from video footage released on Sunday May 8, 2011 by Tokyo Electric Power Co., shows spent fuel storage pool of the Unit 4 reactor building at the crippled Fukushima Dai-ichi nuclear power plant in Okuma town, Fukushima Prefecture, northeastern Japan. #

A 200-ton boat remains in place, deposited on top of a building by the March 11 tsunami in Otsuchi, Iwate Prefecture, northeastern Japan, on May 2, 2011. Work to scrap the boat is expected to begin this month. #

EFA Laboratory manager Eric Eguina puts sample material in a plastic bag while looking for materials possibly containing asbestos in an area devastated by the March 11 tsunami in Shiogama, Miyagi Prefecture, northeastern Japan on April 22, 2011. Inside the chunks of slate and wallboard smashed and scattered by Japan's tsunami hides a health risk that has been overshadowed by contamination from a leaking nuclear plant: the odorless and nearly invisible threat of asbestos. #

Crocidolite, a type of asbestos is seen on a material through a lens of a polarized light microscope at a makeshift laboratory where EFA Laboratory manager Eric Eguina works in Sendai, Miyagi Prefecture, northeastern Japan on April 22, 2011 photo. Chrysotile, another type of asbestos, orange color seen next to the blue crocidolite, is also found on the material. #

A cyclist stops to see the road blocked by fishing boats washed ashore in an area destroyed by the March 11 earthquake and tsunami in Kesennuma, Miyagi Prefecture, northeastern Japan, on Monday, May 9, 2011. #

A man cycles among the rubble in an area devastated by the Match 11 earthquake and tsunami in the town of Rikuzentakata, Iwate Prefecture, Japan, Thursday, April 14, 2011. #

Japanese dairy farmer Masakatsu Kosone feeds his cows at his farm in the village of Katsurao in Fukushima prefecture, 25 km west of the stricken Fukushima nuclear power plant on May 3, 2011 after returning from a shelter in Fukushima City. #

A wooden cross stands amid the tsunami devastation at a place where a church used to stand in Kesennuma, Miyagi prefecture on April 22, 2011. Japan, on April 22, 2011. #

A man expresses his feelings during a memorial service for the victims of the March 11 earthquake and tsunami at Flora Memorial Hall in Soma, Fukushima Prefecture, northeastern Japan, on Thursday, April 28, 2011. Buddhist priests in black and gold robes chanted and rang bells Thursday to mark the 49th day since Japan's massive tsunami, when the dead are believed to end their restless wandering through the devastated coastline. #

A member of the Japan Self-Defense Force searches for victims at an area devastated by the March 11 earthquake and tsunami in Kamaishi, Iwate prefecture, on April 20, 2011. #

Tokyo Power Electric Co., (TEPCO) President Masataka Shimizu kneels and bows deeply, in apology, toward evacuated Namie Town residents at Nihonmatsu City Hall Towa Branch on May 4, 2011 in Nihonmatsu, Fukushima, Japan. #

A wrecked car carries a flag of Shotaro Ishinomori's cartoon character "Cyborg 009" at a devastated area by the March 11 tsunami in Ishinomaki, Miyagi Prefecture, northeastern Japan, Thursday, May 5, 2011. Nearly two months after their lives were turned upside down by the massive tsunami, the boys and girls of Ishinomaki, many who live still live in shelters or half-ruined homes surrounded by debris, were treated to a stage show of cartoon characters as part of the country's annual Children's Day celebrations. #

A stray cat sits near a destroyed house in an area destroyed by the March 11 earthquake and tsunami in Kesennuma, Miyagi Prefecture, northeastern Japan Monday, May 9, 2011. #

Japan's Emperor Akihito and Empress Michiko pay tribute to those killed by the deadly earthquake and tsunami last month as they look around a damaged fishing port in Otsu town in Kitaibaraki, about 70 km (42 miles) south of the crippled Fukushima Daiichi Nuclear Power Station, April 22, 2011. #

A volunteer worker has dirt and dust sprayed off his clothes after a day's work in the area devastated by the March 11 earthquake and tsunami in Ishinomaki, Miyagi Prefecture, northeastern Japan, on Thursday, May 5, 2011. #

A girl carried on the shoulders of a man waits along with other evacuees to receive donated clothes distributed at an evacuation center in Fukushima, northeastern Japan, on Saturday, April 16, 2011. #

A woman prepares lunch in her small partitioned unit divided by cardboard walls, at an evacuation center for people effected by the March 11 earthquake and tsunami in Miyako, Iwate Prefecture, on April 21, 2011. #

Shoes are left in the dressing room of a kindergarten in the deserted town of Futaba, inside the 20-kilometer (12-mile) evacuation zone, in Fukushima Prefecture, Japan, on Thursday, April 21, 2011. #

Volunteers help clean a cemetery at Jionin temple in Ishinomaki, Miyagi Prefecture, northeastern Japan, on Friday, April 29, 2011. Many volunteers poured into the disaster-hit region at the beginning of the annual Golden Week holiday which began Friday in Japan. #

A man talks on his cell phone as he sits on a sofa among the rubble in the area devastated by March 11 earthquake and tsunami in the town of Soma, Fukushima Prefecture, Japan, on Saturday, April 23, 2011. #

Tsutomu Murai, 31, right, with his wife Makiko, 28, and daughter Haruna, 8, watch the Pacific Ocean as they stand on the basement of their house washed out by tsunami wave in the area devastated by the March 11 tsunami and earthquake in the town of Soma, Fukushima Prefecture, Japan, Sunday, April 24, 2011. #