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.
Data status
Known data
Modelled source data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: Climate TRACE; fuel: Not available
In context: how this plant compares
At 119 MW, NPI SHIRAOI MILL is around the median other plant in Japan (122.4 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.
~536,350 t CO₂/yr (modelled) — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.
Key facts
- Share of Japan other capacity
- 4.0% of 2,999 MW across 15 plants in this dataset
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest other plants in Japan
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Local climate & thermal context
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.
Site climate & environmental severity
This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with thermal cycling the leading environmental stress.
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.
How it compares & nearby plants
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.
Nearby power plants
- Shiraoi - Softbank Solar Power Plant · Solar · 2.6 MW · Hokkaido
- Midorimachi A · Solar · 10 MW · Hokkaido
- Muroran Hatchodaira Solar Power Plant · Solar · 1.2 MW · Hokkaido
- Tomakomai Mill power station · Coal · 73 MW · Hokkaido
- NSC Muroran Works power station · Coal · 245 MW · Hokkaido
- Tomakomai power station · Gas · 250 MW · Hokkaido
Location
Coordinates 42.512, 141.2828 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is NPI SHIRAOI MILL?
NPI SHIRAOI MILL is a 119 MW other power plant in Hokkaido, Japan.
How much CO₂ does NPI SHIRAOI MILL emit?
NPI SHIRAOI MILL has modelled emissions of about 536,350 tonnes of CO₂ per year (Climate TRACE).