Pumped-Storage Hydroelectric Plants in Japan

Honkawa
Location: Kochi
Operator: Shikoku Electric Power Co
Configuration: 2 X 300 MW FPT
Operation: 1982-1984
T/G supplier: MHI, Melco

Photograph courtesy of Shikoku Electric Power Co Ltd
Posted 3 Oct 2001

Kannagawa
Location: Gunma
Operator: Tokyo Electric Power Co
Configuration: 2 X 470 MW FPT Francis
Operation: 2005-2012
T/G supplier: Toshiba, Hitachi
Quick facts: Construction on this plant started in Jul 1993. Unit-1 went commercial on 22 Dec 2005 and Unit-2 completed on 7 Jun 2012. Four addtional units were in the original plan but are not currently scheduled. The powerhouse is about 1,600ft below ground and is supplied by water stored behind two dams in two different prefectures. These are the largest pumped-turbine sets in the world and are of a new more efficient splitter design. The 525-MVA air-cooled generators are also the world's largest of their type and scaled up from the 475-MVA machines at the Kazunogawa power station. The T/G sets operate with an effective head of 653m.

Photograph courtesy of Tokyo Electric Power Co
Re-posted 16 Mar 2013

Kazunogawa
Location: Yamanishi
Operator: Tokyo Electric Power Co
Configuration: 2 X 412 MW FPT
Operation: 1999-2000
T/G supplier: Hitachi, MHI, Melco
Quick facts: Planning for this PSP began in 1995 and the first unit commissioned in Dec 1999 followed by the second in Jun 2000. Two additional units were deferred.

Photograph courtesy of Tokyo Electric Power Co
Posted 12 Sep 2006

Matanogawa
Location: Tottori
Operator: Chugoku Electric Power Co
Configuration: 4 X 300 MW FPT
Operation: 1986-1987
T/G supplier: Hitachi
EPC: Fujita, Maeda
Quick facts: Planning for this PSP began in 1973 and a construction applicaiton was made in 1977. Construction started 1980 and the first unit went commercial in Oct 1986. Four more units were in the original plan. The concrete gravity dam is 69m tall.

Photograph courtesy of Chugoku Electric Power Co Ltd
Posted 15 Sep 2001

Mazegawa Daiichi
Location: Gifu
Operator: Chubu Electric Power Co
Configuration: 2 X 144 MW FPT
Operation: 1974-1976
T/G supplier: Hitachi

Photograph courtesy of Chubu Electric Power Co
Posted 13 Mar 2004

Midono
Location: Nagano
Operator: Tokyo Electric Power Co
Configuration: 2 X 65 MW Francis, 2 X 65 MW FPT
Operation: 1969-1970
T/G supplier: Fuji, Hitachi
Quick facts: On the Azusa River.

Photograph by Qurren (wikimedia)
Re-posted 31 Dec 2007

Okuyahagi
Location: Aichi
Operator: Chubu Electric Power Co
Configuration: 3 X 115 MW, 3 X 260 MW FPT
Operation: 1980-1981
T/G supplier: Hitachi, Toshiba

Photograph courtesy of Chubu Electric Power Co
Posted 13 Mar 2004

Shin Takasegawa
Location: Nagano
Operator: Tokyo Electric Power Co
Configuration: 3 X 367 MW FPT
Operation: 1981
T/G supplier: MHI, Toshiba

Photograph courtesy of Tokyo Electric Power Co
Posted 3 Apr 2004

Shin Toyone
Location: Aichi
Operator: J-Power
Configuration: 5 X 225 MW FPT
Operation: 1972-1973
T/G supplier: Toshiba
Quick facts: On the Tenryu River.

Photograph by Qurren (wikimedia)
Posted 31 Dec 2007

Abbreviations

Data: industcards, Platts UDI World Electric Power Plants Data Base

Updated 16-Mar-2013

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