Japan Clears Restart of World’s Largest Nuclear Power Plant

Japan has taken the final political step to restart the Kashiwazaki–Kariwa Nuclear Power Plant, the world’s largest nuclear facility by capacity, marking a major milestone in its gradual return to nuclear energy nearly 15 years after the Fukushima disaster.

Key Developments

• The Niigata Prefecture Assembly passed a vote of confidence in Governor Hideyo Hanazumi, effectively clearing the way for the plant’s resumption.
• This approval was the last major local political hurdle required for restarting operations.

About Kashiwazaki–Kariwa Nuclear Power Plant

• Location: Niigata Prefecture, about 220 km northwest of Tokyo
• Operator: Tokyo Electric Power Company (TEPCO)
• Total Capacity: 8.2 GW (largest nuclear power plant globally)
• Reactors: 7 units
• Planned Restart:
  • One 1.36 GW unit expected to come online next year
  • Another 1.36 GW unit planned around 2030

Background: Fukushima Disaster and Nuclear Shutdown

• In 2011, a massive earthquake and tsunami caused a triple meltdown at Fukushima Daiichi, operated by TEPCO.
• It was the worst nuclear disaster since Chernobyl, severely damaging public trust in nuclear energy.
• Following the disaster:
  • 54 reactors across Japan were shut down
  • Of the 33 reactors still technically operable, 14 have been restarted so far

Significance of the Decision

• First TEPCO-operated reactor restart since Fukushima, symbolising restored regulatory and political confidence.
• Supports Japan’s efforts to:
  • Reduce dependence on imported fossil fuels
  • Enhance energy security
  • Meet climate and emissions targets
• Marks a watershed moment in Japan’s energy policy shift back towards nuclear power.