Hirokawa-Hidakagawa is a 20 MW wind power plant in Wakayama, Japan. It is operated by ECOPOWER CO LTD. Based on its capacity (estimated), it can supply roughly 17k homes (estimated). It ranks #466 of 692 Japan power plants by installed capacity. Commissioned in 2014, it is around 12 years old — relatively modern. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, wind supplies about 1.2% 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 WRI1020211.
Data status
Known 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: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 20 MW, Hirokawa-Hidakagawa is below the median wind plant in Japan (27 MW). Technically it is described as Onshore. Wind turbines convert moving air into electricity; output is variable and site-dependent, and modern turbines deliver some of the lowest-cost new generation on many grids.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Share of Japan wind capacity
- 13.3% of 150 MW across 6 plants in this dataset
- Age among peers
- 4 of 5 dated wind plants in Japan are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest wind plants in Japan
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by ECOPOWER CO LTD.
Local climate & thermal context
This wind plant converts the kinetic energy of wind into electricity through turbine rotors. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 34.0°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 2% 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: 49/100 — this site sits in the mid 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 #4 largest wind power plant of 6 in Japan by capacity.
Japan has 6 wind power plants in this dataset, together about 150 MW of capacity.
Nearby power plants
- Minabe Solar Power Plant · Solar · 1.1 MW · Wakayama
- Kainan · Oil · 2,100 MW · Wakayama
- Gobo · Oil · 1,800 MW · Wakayama
- Okuyoshino · Hydro · 1,206 MW · Wakayama
- Wakayama · Gas · 147 MW · Wakayama
- Misaki Solar Power Plant · Solar · 10 MW · Wakayama
Location
Coordinates 33.9874, 135.4303 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Hirokawa-Hidakagawa?
Hirokawa-Hidakagawa is a 20 MW wind power plant in Wakayama, Japan, commissioned in 2014.
Who operates Hirokawa-Hidakagawa?
Hirokawa-Hidakagawa is operated by ECOPOWER CO LTD.