By Linda Sieg
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"Fukushima is stamped for the rest of the history of nuclear energy," said Kiyoshi Kurokawa, head of an investigation that concluded the disaster was "profoundly man-made".
The government has spent about $300 billion (32.1 trillion yen) to rebuild the tsunami-devastated Tohoku region, but areas around the Fukushima plant remain off-limits, worries about radiation levels linger and many who left have settled elsewhere. Decommissioning of the crippled plant will take decades and billions of dollars.
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Kurokawa's commission, appointed by parliament, concluded in 2012 that the Fukushima accident was "the result of collusion between the government, regulators and Tokyo Electric Power Co" and a lack of governance.
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Only nine of Japan's 33 remaining commercial reactors have been approved for restarts under post-Fukushima safety standards and only four are operating, compared with 54 before the disaster.
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