Oita Co-operative power plant is a 657 MW gas power station in Oita, Japan. It is operated by Oita Cooperative Thermal Power Co Inc. Based on its capacity (estimated), it can supply roughly 740k homes (estimated). It ranks #130 of 692 Japan power plants by installed capacity. Commissioned in 1972, it is around 54 years old — an older, legacy facility. Its modelled annual emissions are 1,432,300 t CO₂/yr (Climate TRACE), equivalent to about 334k cars driven for a year. In context, gas supplies about 32.8% 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-5223.
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: Climate TRACE source-record fuel
At 657 MW, Oita Co-operative power plant is below the median gas plant in Japan (847 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG). Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.
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).
Operated by Oita Cooperative Thermal Power Co Inc.
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 33.3°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 34% 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: 36/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
A gas turbine here also runs ~0% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).
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 corrosive environment (estimated ISO 9223 class C4 — High), with humidity / wetness 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 #37 largest gas power plant of 66 in Japan by capacity.
Japan has 66 gas power plants in this dataset, together about 74,949 MW of capacity.
Coordinates 33.2687, 131.648 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Oita Co-operative power plant is a 657 MW source-record gas power plant in Oita, Japan, commissioned in 1972.
Its output is enough to supply roughly 739,969 homes (estimated).
Oita Co-operative power plant is operated by Oita Cooperative Thermal Power Co Inc.
Oita Co-operative power plant has modelled emissions of about 1,432,300 tonnes of CO₂ per year (Climate TRACE).
