Kashiwazaki Kariwa is a 7,965 MW nuclear power station in Niigata, Japan. It ranks #1 of 692 Japan power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, nuclear supplies about 9.1% of Japan's electricity; the national grid averages 477 gCO₂/kWh (32.7% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000679.
Data status
Known data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Capacity provenance
The public capacity above is the current source-record value. A 2026 tracker candidate lists 5,500 MW for Kashiwazaki Kariwa nuclear power plant, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).
Data provenance
Source of the capacity and fuel values:
capacity: Wikidata P2109; fuel: WRI GPPD
In context: how this plant compares
At 7,965 MW, Kashiwazaki Kariwa is well above the median nuclear plant in Japan (2,070 MW). Technically it is described as boiling water reactor. Its current lifecycle status is “Construction” — so it is not yet, or no longer, generating at full output. Nuclear plants split uranium to raise steam with no direct CO₂; they run as steady baseload with very high capacity factors and the longest operating lifetimes of any thermal plant.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
How it compares & nearby plants
The #1 largest nuclear power plant of 24 in Japan by capacity.
Japan has 24 nuclear power plants in this dataset, together about 58,491 MW of capacity.
Nearby power plants
- Joetsu Green power station · Gas · 109.2 MW · Niigata
- Joetsu Solar Power Plant · Solar · 2 MW · Niigata
- Joetsu power station · Gas · 572 MW · Niigata
- Shinanogawa · Hydro · 181 MW · Niigata
- Maki nuclear power plant · Nuclear · 1,847 MW · Niigata Prefecture
- Yotsugoya · Solar · 56 MW · Niigata
Location
Coordinates 37.4259, 138.5941 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Kashiwazaki Kariwa?
Kashiwazaki Kariwa is a 7,965 MW nuclear power plant in Niigata, Japan, Construction 1985.