Grid Storage

Matanogawa hydroelectric plant

Japan

6th-largest grid storage in Japan of 35 · top 44% worldwide (#420 of 965)

Owner
The Chugoku Electric Power Co Inc
Status
operating
Capacity
1,200 MW
Technology
pumped storage
Commissioned
1986
Also listed as
A power plant — this site generates as well as stores

Comparable grid storages · Japan · 35 ranked

All grid storages in Japan

Grid connection · within 50 km

Nearest substation
東群馬変電所
Its voltage
500 kV
Distance
1.5 km
Strongest line nearby
500 kV
Line operator
東京電力パワーグリッド
Substations in range
5

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

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Portfolio

Watercourse: Matano River, Doyo River

SOURCE: Global Energy Monitor · Global Integrated Power, March 2026 (CC BY 4.0)