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Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
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- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
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- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
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- Storage / Tank Farm38
- Oil / Commodity Contract19
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- Carbon Capture (CCS)16
Chokepoints
Grid Storage
Okawachi hydroelectric plant
4th-largest grid storage in Japan of 35 · top 23% worldwide (#218 of 965)
- Owner
- Kansai Electric Power Co
- Status
- operating
- Capacity
- 1,280 MW
- Technology
- pumped storage
- Commissioned
- 1992
- 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
- #6Matanogawa hydroelectric plant1.2 GW
Grid connection · within 50 km
- Nearest substation
- 山崎開閉所
- Its voltage
- 500 kV
- Distance
- 13 km
- Strongest line nearby
- 500 kV
- Substations in range
- 3
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
- Okawachi hydroelectric plant0 m · Power Plant · 1.3 GW · hydro
- 500 kV line322 m · Transmission Line
- 山崎開閉所13 km · Substation / Converter
- Okutataragi hydroelectric plant16 km · Power Plant · 1.9 GW · hydro
- Okutataragi hydroelectric plant16 km · Grid Storage · 1.9 GW
- 播磨線17 km · Transmission Line
On the interactive map
Watercourse: Ōta River, Inumi River
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)