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- Transmission Line80,968
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Chokepoints
Grid Storage
Imaichi hydroelectric plant
10th-largest grid storage in Japan of 35 · top 45% worldwide (#434 of 965)
- Owner
- Tokyo Electric Power Company Holdings INC (TEPCO)
- Status
- operating
- Capacity
- 1,050 MW
- Technology
- pumped storage
- Commissioned
- 1988
- Also listed as
- A power plant — this site generates as well as stores
Comparable grid storages · Japan · 35 ranked
- #1Kannagawa hydroelectric plant2.8 GW
- #8Tamahara hydroelectric plant1.2 GW
- #9Shintoyone hydroelectric plant1.1 GW
- #10Imaichi hydroelectric plant1.1 GW
- #11Okukiyotsu hydroelectric plant1.0 GW
- #12Shimogo hydroelectric plant1.0 GW
Grid connection · within 50 km
- Nearest substation
- 新今市開閉所
- Its voltage
- 500 kV
- Distance
- 20 km
- Strongest line nearby
- 500 kV
- Line operator
- 東京電力パワーグリッド
- 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
- Imaichi hydroelectric plant0 m · Power Plant · 1.1 GW · hydro
- 今市線478 m · Transmission Line
- 下郷線 / 塩原線595 m · Transmission Line
- Kinugawa hydroelectric plant2.5 km · Power Plant · 127 MW · hydro
- 500 kV line19 km · Transmission Line
- 新今市開閉所20 km · Substation / Converter
On the interactive map
Watercourse: Tokawa River
SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)