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Chokepoints
Grid Storage
Mazegawa Daiichi hydroelectric plant
27th-largest grid storage in Japan of 35 · top 80% worldwide (#766 of 965)
- Operator
- Chubu Electric Power
- Owner
- Chubu Electric Power Co Inc
- Status
- operating
- Capacity
- 288 MW
- Technology
- pumped storage
- Commissioned
- 1976
- Also listed as
- A power plant — this site generates as well as stores
Comparable grid storages · Japan · 35 ranked
- #1Kannagawa hydroelectric plant2.8 GW
- #25Okumino Daiichi hydroelectric plant323 MW
- #26Shin Narihagawa hydroelectric plant303 MW
- #27Mazegawa Daiichi hydroelectric plant288 MW
- #28Shiroyama hydroelectric plant250 MW
- #29Midono hydroelectric plant245 MW
Grid connection · within 50 km
- Nearest substation
- 北部変電所
- Its voltage
- 500 kV
- Distance
- 32 km
- Strongest line nearby
- 500 kV
- Line operator
- 中部電力パワーグリッド
- 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
- Mazegawa Daiichi hydroelectric plant0 m · Power Plant · 288 MW · hydro
- 越美幹線16 km · Transmission Line
- 500 kV line22 km · Transmission Line
On the interactive map
Portfolio
Watercourse: Maze River
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)