scrutiny after a 9.0 magnitude earthquake and a massive tsunami hit the plant on March 11, 2011. The disaster triggered three reactor meltdowns, a series of explosions and a radiation leak that forced 150,000 people to flee nearby villages.
Tepco's hapless efforts since to stabilise the situation have been like someone playing "whack-a-mole", Minister of Economy, Trade and Industry Toshimitsu Motegi has said.
Hayashi is one of an estimated 50,000 workers who have been hired so far to shut down the nuclear plant and decontaminate the towns and villages nearby. Thousands more will have to follow. Some of the workers will be needed to maintain the system that cools damaged fuel rods in the reactors with thousands of tonnes of water every day. The contaminated runoff is then transferred to more than 1,000 tanks, enough to fill more than 130 Olympic-sized swimming pools.
Dismantling the Fukushima Daiichi plant will require maintaining a job pool of at least 12,000 workers just through 2015, according to Tepco's blueprint. That compares to just over 8,000 registered workers now. In recent months, some 6,000 have been working inside the plant.
The Tepco hiring estimate does not include the manpower required for the government's new $330 million plan to build a massive ice wall around the plant to keep radiated water from leaking into the sea.
"I think we should really ask whether they are able to do this while ensuring the safety of the workers," said Shinichi Nakayama, deputy director of safety research at the Japan Atomic Energy Agency.
Japan's nuclear industry has relied on cheap labour since the first plants, including Fukushima, opened in the 1970s. For years, the industry has rounded up itinerant workers known as "nuclear gypsies" from the Sanya neighbourhood of Tokyo and Kamagasaki in Osaka, areas known for large numbers of homeless men.
"Working conditions in the nuclear industry have always been bad," said Saburo Murata, deputy director of Osaka's Hannan Chuo Hospital. "Problems with money, outsourced recruitment, lack of proper health insurance - these have existed for decades."
The Fukushima project has magnified those problems. When Japan's parliament approved a bill to fund decontamination work