Tokyo Electric Power Company (TEPCO) has restarted unit 6 of its Kashiwazaki-Kariwa nuclear power plant at Japan’s Niigata Prefecture (TEPCO press release, 09/02/2026). With a capacity of 1,356 MW the Advanced Boiling Water Reactor (ABWR) unit had been offline since the 2011 Fukushima disaster.
The company plans to raise pressure inside the reactor gradually, resume power generation and transmission on 16 February to then halt operations to conduct an inspection from the Nuclear Regulation Authority. Commercial operations are expected to start on 18 March 2026 (Yomiuri, 09/02/2026). In January 2026, TEPCO attempted to restart Unit 6 but shut it down just one day later after detecting a malfunction (KEI, 22/01/2026).
As of 2024, Japan had a nuclear capacity of 33 GW of which only 13 GW were currently in operation.
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