Nobeoka power station — Japan

Nobeoka power station is a 110 MW coal power station in Miyazaki, Japan. It is operated by Asahi Kasei Corp. Based on its capacity (estimated), it can supply roughly 138k homes (estimated). It ranks #248 of 692 Japan power plants by installed capacity. Its modelled annual emissions are 313,830 t CO₂/yr (Climate TRACE), equivalent to about 73k cars driven for a year. In context, coal supplies about 32.1% 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-5273.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000102950; fuel: GEM wiki unit table: coal primary with woody-biomass co-firing note

In context: how this plant compares

At 110 MW, Nobeoka power station is below the median coal plant in Japan (250 MW). Coal plants burn pulverised coal to raise high-pressure steam for a turbine; they run as baseload but are the most carbon-intensive mainstream source and the first targeted for retirement or efficiency retrofits.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

~313,830 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 coal capacity

0.2% of 53,431 MW across 94 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 coal plants in Japan

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Asahi Kasei Corp.

Local climate & thermal context

This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 32.6°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 49% 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: 30/100 — this site sits in the bottom 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 corrosive environment (estimated ISO 9223 class C4 — High), with humidity / wetness 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 #74 largest coal power plant of 94 in Japan by capacity.

Japan has 94 coal power plants in this dataset, together about 53,431 MW of capacity.

Nearby power plants

• Hyuga power station · Biomass · 50 MW · Miyazaki
• Omarugawa · Hydro · 1,200 MW · Miyazaki
• Saiki power station · Biomass · 50 MW · Oita
• Hitotsuse · Hydro · 180 MW · Miyazaki
• Kamenoko · Solar · 32.6 MW · Miyazaki
• Oita - Hoso Solar Power Plant · Solar · 11 MW · Oita

Location

Coordinates 32.5733, 131.6718 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions