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- Transmission Line80,968
- Power Plant32,429
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Chokepoints
Grid Storage
Okumino hydroelectric plant
3rd-largest grid storage in Japan of 35 · top 15% worldwide (#141 of 965)
- Operator
- Chubu Electric Power
- Owner
- Chubu Electric Power Co Inc
- Status
- operating
- Capacity
- 1,500 MW
- Technology
- pumped storage
- Commissioned
- 1994
- Also listed as
- A power plant — this site generates as well as stores
Comparable grid storages · Japan · 35 ranked
- #1Kannagawa hydroelectric plant2.8 GW
- #2Okutataragi hydroelectric plant1.9 GW
- #3Okumino hydroelectric plant1.5 GW
- #4Okawachi hydroelectric plant1.3 GW
- #5Shintakasegawa hydroelectric plant1.3 GW
Grid connection · within 50 km
- Nearest substation
- 北部変電所
- Its voltage
- 500 kV
- Distance
- 34 km
- Strongest line nearby
- 500 kV
- Substations in range
- 2
Mapped grid infrastructure from OpenStreetMap, whose coverage is excellent in some regions and sparse in others. Nothing shown here means nothing is mappednearby — not that the site is unconnected. Lines are matched on a segment’s midpoint, so a corridor passing directly overhead can be missed; this under-reports rather than invents.
Co-located infrastructure · within 25 km
- Okumino hydroelectric plant0 m · Power Plant · 1.5 GW · hydro
- 500 kV line50 m · Transmission Line
- Tokuyama hydroelectric plant16 km · Power Plant · 162 MW · hydro
- Nagano hydroelectric plant18 km · Power Plant · 220 MW · hydro
- Nagano hydroelectric plant18 km · Grid Storage · 220 MW
- 三岐幹線22 km · Transmission Line
- 西部幹線23 km · Transmission Line
On the interactive map
Portfolio
Watercourse: Nishigaboratani River, Neohigashidani River
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)