Yatsushiro Mill power station is a 75 MW coal power plant in Kumamoto Prefecture, Japan. It is operated by Nippon Paper Industries Co Ltd [100%]. Based on its capacity (estimated), it can supply roughly 94k homes (estimated). It ranks #278 of 692 Japan power plants by installed capacity. Commissioned in 1993, it is around 33 years old — long-established. 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 GEM_coa_yatsushiromill_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 · L100000102932; fuel: GEM GCPT
At 75 MW, Yatsushiro Mill power station is below the median coal plant in Japan (250 MW). Technically it is described as subcritical. 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.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Nippon Paper Industries Co Ltd [100%].
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 32.5°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 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 #81 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.
Coordinates 32.5058011, 130.6199833 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Yatsushiro Mill power station is a 75 MW coal power plant in Kumamoto Prefecture, Japan, commissioned in 1993.
Its output is enough to supply roughly 93,857 homes (estimated).
Yatsushiro Mill power station is operated by Nippon Paper Industries Co Ltd [100%].
