Japan Continues Slow Restart Of Nuclear Power Generation W. Upgraded Unit In Niigata Prefecture
The activity around the Kashiwazaki-Kariwa nuclear power plant is reaching its peak: workers remove earth to expand the width of a main road, while lorries arrive at its heavily guarded entrance. A long perimeter fence is lined with countless coils of razor wire, and in a layby, a police patrol car monitors visitors to the beach – one of the few locations with a clear view of the reactors, framed by a snowy Mount Yoneyama. When all seven of its reactors are working, Kashiwazaki-Kariwa generates 8.2 gigawatts of electricity, enough to power millions of households. Occupying 4.2 sq km of land in Niigata prefecture on the Japan Sea coast, it is the biggest nuclear power plant in the world.
Since 2012, however, the plant has not generated a single watt of electricity, after being shut down, along with dozens of other reactors, in the wake of the March 2011 triple meltdown at Fukushima Daiichi, the world’s worst nuclear accident since Chornobyl. Located about 220km (136 miles) north-west of Tokyo, the Kashiwazaki-Kariwa plant is run by Tokyo Electric Power (Tepco), the same utility in charge of the Fukushima facility when a powerful tsunami crashed through its defences, triggering a power outage that sent three of its reactors into meltdown and forcing 160,000 people to evacuate.
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The utility company says it has learned the lessons of the Fukushima Daiichi accident, and earlier this year pledged to invest 100 bn yen (£470m) into Niigata prefecture over the next 10 years in an attempt to win over residents. The Kashiwazaki-Kariwa plant, whose 6,000 staff have remained on duty throughout the long shutdown, has seawalls and watertight doors to provide stronger protection against a tsunami, while mobile diesel-powered generators and a large fleet of fire engines are ready to provide water to cool reactors in an emergency. Upgraded filtering systems have been installed to control the spread of radioactive materials.
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The Kashiwazaki-Kariwa restart is a gamble for Japan’s government, which has put an ambitious return to nuclear power generation at the centre of its new energy policy as it struggles to reach its emissions targets and bolster its energy security.
Before the Fukushima disaster, 54 reactors were in operation, supplying about 30% of the country’s power. Now, of 33 operable reactors, just 14 are in service, while attempts to restart others have faced strong local opposition.
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https://www.theguardian.com/world/2026/jan/19/japan-nuclear-plant-restart-kashiwazaki-kariwa-fukushima