IWAKUNI MILL NPI is a 159 MW oil power station in Yamaguchi, Japan. Based on its capacity (estimated), it can supply roughly 119,461 homes (estimated). It ranks #186 of 659 Japan power plants by installed capacity. Its measured emissions of 87,776 t CO₂/yr (Climate TRACE) are equivalent to about 20,461 cars driven for a year. In context, oil supplies about 2.5% 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 CT-5312.
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).
This oil plant burns oil or diesel to drive turbines or reciprocating engines. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 34.2°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 28% 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: 39/100 — 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 #29 largest oil power plant of 37 in Japan by capacity.
Japan has 37 oil power plants in this dataset, together about 45,972 MW of capacity.
Coordinates 34.1766, 132.2371 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
