World Power Plants

Midono245 MW Hydroelectric

HydroRenewable

Ranked as the 209th largest power generation facility in Japan, Midono stands out not just for its capacity of 245 MW, but also for its significant role within the local hydroelectric landscape. This facility is classified as the 44th largest hydro plant among 90 in the country, underscoring its contribution to Japan's diverse energy portfolio. While Japan's energy profile is heavily influenced by nuclear power, which comprises a dominant share of the national capacity of 357,453 MW across 664 plants, Midono plays a vital role in the hydropower sector, contributing approximately 0.07% to the national capacity. Midono utilizes advanced hydroelectric generation technology, relying on the natural flow of water to produce electricity. The facility is part of a region rich in hydro resources, notably surrounded by larger plants such as the Shin Takasegawa and its pumped storage counterpart, both boasting a substantial capacity of 1,280 MW each. Nearby, Azumi adds another 623 MW of hydro capacity, while solar energy is represented by the Suwa and Suwa A plants, which provide 46.8 MW and 5 MW, respectively. This notable hydro energy cluster highlights the importance of water resources in the region, positioning Midono as a key player in the local energy mix. In the context of Japan's overall energy strategy, which heavily leans towards nuclear energy, the contribution of hydro plants like Midono is crucial for achieving energy diversification and sustainability. With a national capacity average that highlights the dominance of nuclear, the role of hydroelectric power is increasingly significant in balancing energy needs and promoting renewable sources. Owned and operated by Tokyo, Midono was commissioned to harness the natural hydrological resources effectively. Since its inception, it has been part of Japan's efforts to enhance energy security and reduce greenhouse gas emissions through cleaner energy production. Looking ahead, Midono's impact extends beyond mere numbers; it exemplifies Japan's commitment to renewable energy and hydroelectric power's role in a sustainable future. As the demand for clean energy continues to grow, the significance of facilities like Midono in providing reliable and renewable electricity cannot be overstated.

Capacity
245 MW
Commissioning Year
1997

29 years old

Owner
Tokyo
Location
36.1538°, 137.7463°

Japan, Asia

Context & rankings
  • 207. largest of 662 plants in Japan
  • #6,764 worldwide by installed capacity
  • #1,264 of 8,493 Hydroelectric plants worldwide
  • 0.07% of the installed capacity of Japan
Age & fleet comparison

29 years in operation

Hydroelectric fleet average: 42.1 years

Operator portfolio

Tokyo operates 24 plants totalling 47,440 MW

Regional density

34 plants within 100 km, 7,942 MW combined

Nearest plant: Azumi (3.5 km)

Location

Coordinates:: 36.153800, 137.746300
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Carbon Footprint

Zero Direct Emissions

Midono is a hydro power plant producing approximately 858 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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