Tomari — Japan

Tomari is a 2,070 MW nuclear power station in Hokkaido, Japan. It ranks #29 of 692 Japan power plants by installed capacity. Commissioned in 1989, it is around 37 years old — long-established. 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 WRI1000674.

Data provenance

Source of the capacity and fuel values:

capacity: Wikidata P2109; fuel: WRI GPPD

In context: how this plant compares

At 2,070 MW, Tomari is around the median nuclear plant in Japan (2,070 MW). Technically it is described as pressurized water reactor. Its current lifecycle status is “Mothballed” — 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 #12 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

• Jozankei · Hydro · 120 MW · Hokkaido
• Hoheiko · Hydro · 52 MW · Hokkaido
• Ishikariwan Shinko power station · Gas · 569.4 MW · Hokkaido
• Ishikari Bay power station · Biomass · 52 MW · Hokkaido
• Date power station · Oil · 700 MW · Date
• Date City · Solar · 10.4 MW · Hokkaido

Location

Coordinates 43.0367, 140.5125 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions