Japan restarts Kashiwazaki-Kariwa Nuclear Power Plant
Analysis based on 15 articles · First reported Dec 21, 2025 · Last updated Dec 22, 2025
The restart of the Kashiwazaki-Kariwa Nuclear Power Plant is expected to positively impact Japan's energy security and reduce its reliance on costly imported fossil fuels, potentially lowering energy costs for businesses and consumers. This move could also boost the stock performance of Tokyo Electric Power Company, despite lingering public concerns.
Japan has taken a decisive step towards restarting the Kashiwazaki-Kariwa Nuclear Power Plant, the world's largest nuclear station, nearly 15 years after the Fukushima Daiichi Nuclear Power Plant disaster. The Japan — Ōita Prefecture assembly passed a vote of confidence in Governor Hideyo Hanazumi, who backed the restart, effectively removing the final political obstacle. Tokyo Electric Power Company (TEPCO), the operator, plans to reactivate the first of seven reactors as early as January 20. This move is crucial for Japan to strengthen its energy security, reduce dependence on imported fossil fuels, and meet rising energy demand driven by AI data centers and decarbonization goals. Despite TEPCO's pledge of 100 billion yen investment in Japan — Ōita Prefecture, significant local opposition remains, with many residents, including activist Ayako Oga, expressing concerns about safety and TEPCO's operational capabilities due to the Fukushima Daiichi Nuclear Power Plant incident. Prime Minister Sanae Takaichi supports nuclear restarts as part of the national energy strategy.
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