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Outline of Domestic Facilities
Generating Facilities
Hydroelectric Power
J-POWER has built and run hydroelectric power stations for about 50 years. As of the end of May 2010, its 59 hydroelectric power stations in Japan had a total capacity of 8,565 megawatts, accounting for about 20% of Japan's hydroelectricity, the largest share in the nation. |
Project List (more than 200MW)
| Name |
Capacity(MW) |
Type |
Started Operation |
| Shintoyone |
1,125 |
pumped storage |
1972 |
| Okukiyotsu |
1,000 |
pumped storage |
1978 |
| Shimogo |
1,000 |
pumped storage |
1988 |
| Numappara |
675 |
pumped storage |
1973 |
| Okukiyotsu No.2 |
600 |
pumped storage |
1996 |
| Tagokura |
395 |
General |
1959 |
| Okutadami |
560 |
General |
1960 |
| Ikehara |
350 |
pumped storage |
1964 |
| Sakuma |
350 |
General |
1956 |
| Tedorigawa No.1 |
250 |
General |
1979 |
| Nagano |
220 |
pumped storage |
1968 |
| Miboro |
215 |
General |
1961 |
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Thermal Power Generation
J-POWER operates seven coal-fired and one geothermal power station in this category. It specializes in coal-fired power generation.
As of July 2009, J-POWER operated seven coal-fired power stations with a combined output of 8,424 megawatts. J-POWER is the largest coal-fired thermal power station operator in Japan, with about 25% share of nationwide output. |
Project List
| Name |
Capacity(MW) |
Fuel Type |
Started |
| Tachibanawan |
2,100 |
Coal |
2000 |
| Matsuura |
2,000 |
Coal |
1990 |
| Takehara |
1,300 |
Coal |
1967 |
| Matsushima |
1,000 |
Coal |
1981 |
| Isogo |
1,200 |
Coal |
2002 |
| Takasago |
500 |
Coal |
1968 |
| Ishikawa Coal |
312 |
Coal |
1986 |
| Onikobe |
15 |
Geothermal |
1975 |
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Distribution Facilities
As of the end of June 2008, J-POWER maintained a nationwide network of 2,400 kilometers of transmission lines and a total of eight substations, frequency converter stations and alternating current/direct current (AC/DC) converter stations, plus a telecommunications network.
| Transmission Lines |
| Total Lines |
2,407.7km |
| Extra-high voltage transmission lines |
1,973.4km |
| DC power transmission lines |
267.2km |
| Substations |
| Number |
3 |
| Capacity |
4,292MVA |
| Frequency Converter Station |
| Number |
1 |
| Capacity |
300MW |
| AC/DC Converter Stations |
| Number |
4 |
| Capacity |
2,000MW |
| Telecommunications Network |
| Total circuit length |
5,896km |
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