NPI SHIRAOI MILL is a 119 MW other power station in Hokkaido, Japan. Based on its capacity (estimated), it can supply roughly 89k homes (estimated). It ranks #228 of 692 Japan power plants by installed capacity. Its modelled annual emissions are 536,350 t CO₂/yr (Climate TRACE), equivalent to about 125k 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-5252.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and fuel fields on this page are source-record values from the upstream open dataset. They are useful for identification and ranking, but they have not been upgraded to a 2026 registry/GEM-location verified value.
capacity: Climate TRACE source-record capacity (modelled/legacy); fuel: Primary fuel not stated in available source record; classified as Other/industrial-mixed pending country registry match
At 119 MW, NPI SHIRAOI MILL is around the median other plant in Japan (122 MW). This facility converts its energy source into electricity for the grid; its capacity, fuel type and location determine its role in the national power mix.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
This other plant generates electricity for the grid. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 42.5°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 71% 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.
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.
For a plant’s outdoor hardware — heat-recovery steam generators (HRSG), expansion joints, valves, flanges and their insulation — the local climate sets how fast unprotected steel and coatings degrade. This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with thermal cycling the leading environmental stress.
Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
The #9 largest other power plant of 15 in Japan by capacity.
Japan has 15 other power plants in this dataset, together about 2,999 MW of capacity.
Coordinates 42.512, 141.2828 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
NPI SHIRAOI MILL is a 119 MW source-record other power plant in Hokkaido, Japan.
Its output is enough to supply roughly 89,351 homes (estimated).
NPI SHIRAOI MILL has modelled emissions of about 536,350 tonnes of CO₂ per year (Climate TRACE).
