Kaminoseki nuclear power plant — Japan

Kaminoseki nuclear power plant is a 2,746 MW nuclear power station in Yamaguchi Prefecture, Japan. It ranks #21 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 GEM_nuc_kaminoseki_japan.

Data provenance

Source of the capacity and fuel values:

capacity: GEM Global Nuclear Power Tracker September 2025 unit-status sum (shelved); fuel: GEM GNPT

In context: how this plant compares

At 2,746 MW, Kaminoseki nuclear power plant 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 “Shelved” — 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 #8 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

• Yanai · Gas · 1,578 MW · Yamaguchi
• Hikari Works power station · Coal · 53 MW · Yamaguchi
• Kudamatsu Thermal power plant · Oil · 700 MW · Yamaguchi
• Iwakuni Thermal power station · Oil · 850 MW · Yamaguchi
• Idemitsu Tokuyama Biomass power station · Biomass · 50 MW · Yamaguchi
• Tokuyama East power station · Coal · 445 MW ·

Location

Coordinates 33.8512, 132.1182 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions