Saijo power station is a 406 MW coal power station in Ehime, Japan. It is operated by Shikoku Electric Power Co. Based on its capacity (estimated), it can supply roughly 508,080 homes (estimated). It ranks #139 of 659 Japan power plants by installed capacity. Commissioned in 1968, it is around 58 years old — an older, legacy facility. Its measured emissions of 4,169,500 t CO₂/yr (Climate TRACE) are equivalent to about 971,911 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 WRI1020036.
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 Shikoku Electric Power Co. All plants by this company →
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 33.9°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 16% 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: 44/100 — 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 #28 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 33.9327, 133.1677 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
