Tomatouatsuma power station is a 1,650 MW other power station in Hokkaido, Japan. It is operated by Hokkaido Electric Power Co Inc. Based on its capacity (estimated), it can supply roughly 1,238,914 homes (estimated). It ranks #46 of 659 Japan power plants by installed capacity. Its measured emissions of 9,172,600 t CO₂/yr (Climate TRACE) are equivalent to about 2,138,135 cars driven for a year. In context, the national grid averages 477 gCO₂/kWh (32.7% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id CT-5178.
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 Hokkaido Electric Power Co Inc. All plants by this company →
This other plant generates electricity for the grid. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 42.6°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 67% above 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: 86/100 — this site sits in the top 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 #1 largest other power plant of 35 in Japan by capacity.
Japan has 35 other power plants in this dataset, together about 10,650 MW of capacity.
Coordinates 42.6118, 141.8054 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
