by TEPCO (Tokyo Electric Power Company)JP
Restore a large-capacity nuclear unit to generate carbon-free power and support Japan's decarbonization.
Unit 6 returned to commercial operation on April 16, 2026.
Updated 16 Apr 2026Checked 11 Oct0 updates this week
A boiling water reactor sustains a controlled chain reaction in uranium fuel, releasing heat that boils water and spins a turbine.
| Spec | Kashiwazaki-Kariwa Restart |
|---|---|
| Capacity | 1,315 MWR (reported) |
| Reactor Type | Advanced Boiling Water ReactorR (reported) |
R reported by the company
TEPCO (Tokyo Electric Power Company)
Japan nuclear power, LNG, renewable energy
Japan's largest electric utility group, serving the Kanto region and adjacent areas. Operates through generation, transmission, and retail divisions. In April 2026, TEPCO restarted Kashiwazaki-Kariwa Unit 6, the world's largest nuclear plant, after 14 years offline.
