Onbetsu power station is a 148 MW oil power station in Kushiro, Japan. It is operated by Hokkaido Electric Power Co Inc [100%]. Based on its capacity (estimated), it can supply roughly 111k homes (estimated). It ranks #217 of 692 Japan power plants by installed capacity. Commissioned in 1978, it is around 48 years old — long-established. 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 GOGPT_onbetsu_japan.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and/or fuel fields on this page include a source-backed provenance label from GEM, an official registry, Wikidata, OSM, or a cross-source match.
capacity: GEM · 2026 · L100000408482; fuel: GEM GOGPT
At 148 MW, Onbetsu power station is below the median oil plant in Japan (1,000 MW). Technically it is described as OCGT. Oil-fired plants burn heavy fuel oil or diesel, usually as peaking or backup capacity on islands and grids without gas pipelines; high fuel cost keeps their utilisation low.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Hokkaido Electric Power Co Inc [100%].
This oil plant burns oil or diesel to drive turbines or reciprocating engines. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 42.9°N — which shapes how much energy it can produce and how its output varies through the year.
Climate zone & typical temperatures: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).
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 #36 largest oil power plant of 41 in Japan by capacity.
Japan has 41 oil power plants in this dataset, together about 48,987 MW of capacity.
Coordinates 42.898342, 143.938964 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Onbetsu power station is a 148 MW oil power plant in Kushiro, Japan, commissioned in 1978.
Its output is enough to supply roughly 111,126 homes (estimated).
Onbetsu power station is operated by Hokkaido Electric Power Co Inc [100%].
