World Power Plants

Nagano220 MW Hydroelectric

HydroRenewable

Ranked as the 212th largest power generation facility in Japan, Nagano hydroelectric plant plays a crucial role in the nation's energy landscape, particularly as Japan seeks to diversify its energy sources following the Fukushima disaster. With a capacity of 220 MW, Nagano is also the 46th largest hydro facility in the country, contributing 0.06% to Japan's total capacity of 357,453 MW. This facility harnesses the power of water, utilizing advanced hydroelectric technology to convert the kinetic energy of flowing water into electricity, thus ensuring a sustainable energy output. Situated in a region rich with hydroelectric resources, Nagano is surrounded by several notable facilities. The nearby Okumino plant stands out with a significant capacity of 1500 MW, making it a major player in the local hydro cluster. Other nearby plants include Tedorigawa Daiichi (250 MW), Miboro (215 MW), Yokoyama (70 MW), and Oshirakawa (59 MW). This concentration of hydroelectric power plants enhances the stability and reliability of the regional grid, as they can collectively contribute to meeting peak demand and providing ancillary services. Japan's energy profile is predominantly characterized by its reliance on nuclear power, which is currently the dominant fuel type. However, facilities like Nagano are vital in the country's strategy to increase renewable energy generation. With 664 total plants across Japan, the average capacity per facility is roughly 538 MW, highlighting Nagano's role as an essential yet smaller component of the overall energy mix. Owned and operated by EPDC, Nagano was put into operation years ago, and continues to be a significant asset in Japan's energy portfolio. Its operational status not only supports local communities but also aligns with national goals to reduce carbon emissions and transition toward a more sustainable energy future. As Japan pushes forward with its energy transition, the importance of hydroelectric power generation, as exemplified by the Nagano plant, will likely increase. By leveraging its natural water resources, the facility not only contributes to energy generation but also plays a critical role in maintaining ecological balance and supporting economic development in the region.

Capacity
220 MW
Commissioning Year
1994

32 years old

Owner
EPDC
Location
35.8894°, 136.6881°

Japan, Asia

Context & rankings
  • 210. largest of 662 plants in Japan
  • #7,071 worldwide by installed capacity
  • #1,368 of 8,493 Hydroelectric plants worldwide
  • 0.06% of the installed capacity of Japan
Age & fleet comparison

32 years in operation

Hydroelectric fleet average: 42.1 years

Operator portfolio

EPDC operates 12 plants totalling 6,322 MW

Regional density

38 plants within 100 km, 34,707 MW combined

Nearest plant: Okumino (16.8 km)

Location

Coordinates:: 35.889400, 136.688100
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Carbon Footprint

Zero Direct Emissions

Nagano is a hydro power plant producing approximately 771 GWh of clean electricity per year with zero direct CO₂ emissions during operation.

Lifecycle emissions: ~24 g CO₂/kWh (manufacturing, transport, decommissioning)

Technical Details

Primary Fuel Type
Hydro
Energy Source
Renewable
Country
Japan
Continent
Asia
Data Source
Global Power Plant Database

JapanEnergy Profile

662
Total Plants
342.8 GW
Total Capacity
GasNuclearCoalOil
Top Fuels

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