Iwaya Ecopower is a 27 MW wind power plant in Fukui, Japan. It is operated by ECOPOWER CO LTD. Based on its capacity (estimated), it can supply roughly 22,976 homes (estimated). It ranks #367 of 659 Japan power plants by installed capacity. Commissioned in 2002, it is around 24 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, wind supplies about 1.2% 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 WRI1020201.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by ECOPOWER CO LTD. All plants by this company →
This wind plant converts the kinetic energy of wind into electricity through turbine rotors. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 36.1°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 30% 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: 68/100 — 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 #3 largest wind power plant of 6 in Japan by capacity.
Japan has 6 wind power plants in this dataset, together about 150 MW of capacity.
Coordinates 36.1379, 136.4313 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
