TEPCO Restarts Kashiwazaki-Kariwa Nuclear Plant After 14-Year Hiatus

• •TEPCO restarted the No. 6 reactor at Kashiwazaki-Kariwa on April 16, 2026.
• •This is the first TEPCO reactor to resume operations since the 2011 Fukushima disaster.
• •The restart was delayed by 50 days due to technical issues.

On April 16, 2026, Tokyo Electric Power Company Holdings (TEPCO) restarted commercial operations at the No. 6 reactor of the Kashiwazaki-Kariwa nuclear power plant in Niigata Prefecture, Japan, after a 14-year shutdown. This marks the first time since the Fukushima disaster in March 2011 that a TEPCO reactor has resumed normal service. The restart was delayed by 50 days due to technical issues, but TEPCO confirmed there were no abnormalities with the reactor, generator, or turbine prior to the restart. The Kashiwazaki-Kariwa plant is recognized as the world's largest nuclear power facility. The resumption of operations is significant for Japan's energy landscape, as all reactors were shut down following the Fukushima incident. The restart is expected to impact Japan's energy supply and regulatory environment positively. TEPCO aims to enhance safety measures and restore public confidence in nuclear energy. The company has faced scrutiny and regulatory challenges since the Fukushima disaster.