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- Grid Storage965
- Iron Ore Mine949
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Chokepoints
Japan · asset class
Grid Storages in Japan
Japan has 35 grid storages mapped on the OverWatts open energy atlas — the 4th-largest fleet of the 58 countries that hold any, and 4% of the world's mapped total. Of these, 35 operating. The largest is Kannagawa hydroelectric plant (2.8 GW).
The largest owner-operators are Tokyo Electric Power Company Holdings INC (TEPCO) (8), J-Power (7) and Chubu Electric Power Co Inc (6) — Tokyo Electric Power Company Holdings INC (TEPCO) alone is named on 23% of them. Half of Japan's grid storages in service predate 1979 (median commissioning year of the 35 with a known date) and the oldest still listed is Hatanagi Daiichi hydroelectric plant, dating from 1962. They account for 5% of every energy asset OverWatts maps in Japan.
On the interactive map
Largest grid storages in Japan
- Kannagawa hydroelectric plant2.8 GW · 2005
- Okutataragi hydroelectric plant1.9 GW · 1974
- Okumino hydroelectric plant1.5 GW · 1994
- Okawachi hydroelectric plant1.3 GW · 1992
- Shintakasegawa hydroelectric plant1.3 GW · 1979
- Matanogawa hydroelectric plant1.2 GW · 1986
- Omarugawa hydroelectric plant1.2 GW · 2007
- Tamahara hydroelectric plant1.2 GW · 1982
- Shintoyone hydroelectric plant1.1 GW · 1973
- Imaichi hydroelectric plant1.1 GW · 1988
- Okukiyotsu hydroelectric plant1.0 GW · 1978
- Shimogo hydroelectric plant1.0 GW · 1988
- Shiobara hydroelectric plant900 MW · 1994
- Okumino Daini hydroelectric plant780 MW · 1980
- Numappara hydroelectric plant675 MW · 1973
- Nabara hydroelectric plant620 MW · 1976
- Hongawa hydroelectric plant615 MW · 1982
- Kyogoku hydroelectric plant600 MW · 2014
- Okukiyotsu Daini hydroelectric plant600 MW · 1996
- Tenzan hydroelectric plant600 MW · 1986
- Numazawa Daini hydroelectric plant460 MW · 1982
- Azumi Pumped Storage hydroelectric plant412 MW · 1969
- Ikehara hydroelectric plant350 MW · 1964
- Takane Daiichi hydroelectric plant340 MW · 1969
- Okumino Daiichi hydroelectric plant323 MW · 1980
- Shin Narihagawa hydroelectric plant303 MW · 1968
- Mazegawa Daiichi hydroelectric plant288 MW · 1976
- Shiroyama hydroelectric plant250 MW · 1965
- Midono hydroelectric plant245 MW · 1969
- Yagisawa hydroelectric plant240 MW · 1965
- Nagano hydroelectric plant220 MW · 1968
- Niikappu hydroelectric plant200 MW · 1974
- Takami hydroelectric plant200 MW · 1983
- Hatanagi Daiichi hydroelectric plant86 MW · 1962
- Kagedaira hydroelectric plant47 MW · 1968
Who owns Japan's grid storages
- Tokyo Electric Power Company Holdings INC (TEPCO)8 23%
- J-Power7 20%
- Chubu Electric Power Co Inc6 17%
- Hokkaido Electric Power Co Inc3 9%
- The Chugoku Electric Power Co Inc3 9%
- Kansai Electric Power Co2 6%
- Kyushu Electric Power Co Inc2 6%
- Kanagawa Prefectural Government Public Enterprises Agency Electricity Bureau1 3%
Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.
When they were built
- 1960s10
- 1970s8
- 1980s10
- 1990s4
- 2000s2
- 2010s1
Median commissioning year 1979 · oldest Hatanagi Daiichi hydroelectric plant (1962) · newest Kyogoku hydroelectric plant (2014) · 35 of 35 carry a start date
How Japan compares · grid storages by country
- 1. China401
- 2. United States101
- 3. India86
- 4. Spain35
- 5. Japan35
- 6. Austria26
- 7. Germany25
- 8. Australia23
Frequently asked
- How many grid storages are there in Japan?
- OverWatts maps 35 grid storages in Japan — 4% of the world's mapped total, the 4th-largest national fleet of the 58 countries with any.
- What is the largest grid storage in Japan?
- Kannagawa hydroelectric plant, at 2.8 GW.
- Who owns the grid storages in Japan?
- Tokyo Electric Power Company Holdings INC (TEPCO) is named as owner or operator on the most — 8 of 35 (23%). Next are J-Power (7), Chubu Electric Power Co Inc (6) and Hokkaido Electric Power Co Inc (3).
- How old are Japan's grid storages?
- The median commissioning year is 1979, across the 35 in service with a known start date. The oldest still listed is Hatanagi Daiichi hydroelectric plant (1962).