Matsushima power station is a 1,000 MW coal power station in Nagasaki, Japan. It is operated by J-POWER. Based on its capacity (estimated), it can supply roughly 1,251,428 homes (estimated). It ranks #90 of 659 Japan power plants by installed capacity. Commissioned in 1981, it is around 45 years old — long-established. Its measured emissions of 5,560,300 t CO₂/yr (Climate TRACE) are equivalent to about 1,296,107 cars driven for a year. In context, coal supplies about 32.1% 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 WRI1000673.
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions reported to Climate TRACE.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by J-POWER.
This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 32.9°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 34% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 37/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
The #18 largest coal power plant of 70 in Japan by capacity.
Japan has 70 coal power plants in this dataset, together about 43,127 MW of capacity.
Coordinates 32.9409, 129.5969 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
