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Big spending, bigger challenges for Japanese nuclear safety

The seawall at the Hamaoka nuclear plant is built to withstand a 19-meter tsunami.

TOKYO -- Five years on from the Fukushima Daiichi disaster, the cost of new earthquake and tsunami safeguards at Japanese nuclear power plants has ballooned as electric companies work to meet strict new regulations.

     Massive gray walls surround Chubu Electric Power's Hamaoka nuclear plant in Shizuoka Prefecture. The roughly 1.6km seawall completed in December is like a modern-day Great Wall of China.

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