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J-POWER Isogo Thermal Power Station
The J-POWER Isogo Thermal Power Station in Yokohama is one of the world's most efficient coal-fired power plants, serving as a flagship project for clean energy generation from fossil fuels. The facility utilizes cutting-edge ultra-supercritical (USC) technology to maximize thermal efficiency while minimizing fuel consumption and carbon dioxide emissions. A standout feature is its extremely low emission levels of sulfur oxides (SOx) and nitrogen oxides (NOx), achieved through advanced filtration and scrubbing systems. The station consists of two units with a combined capacity of 1,200 megawatts, providing a stable electricity supply to the Tokyo metropolitan area. The original 1960s-era plant was completely replaced between 2002 and 2009 with this new, more environmentally friendly infrastructure. Located on reclaimed land in the Port of Yokohama, the facility benefits from excellent industrial logistics. Isogo impressively demonstrates how technological innovations can drastically reduce the environmental footprint of thermal power generation. It remains a key component of Japan's energy strategy, ensuring grid stability while adhering to rigorous environmental standards.
- Location: Japan
- Top sights: Yokohama Harbor · Okamura-Tenmangu) · Yokohama City Hasseiden Local Museum
- Nearby: Kawasaki (13 km)
Best time to visit & climate
The most pleasant time to visit is May, Jun, Sep.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 2 | 3 | 7 | 12 | 17 | 21 | 25 | 26 | 22 | 16 | 10 | 5 |
| Rain mm | 66 | 67 | 115 | 129 | 142 | 181 | 180 | 155 | 215 | 222 | 97 | 69 |
📋 Practical info
Geography
Facts
- Features a total installed capacity of 1,200 megawatts (two 600 MW units).
- Utilizes Ultra-Supercritical (USC) technology for maximum thermal efficiency.
- Achieved a reduction of SOx and NOx emissions by over 90 percent.
- The replacement project was fully completed between 2002 and 2009.
- Built on a 12-hectare site in the industrial area of the Port of Yokohama.
- Regarded as one of the cleanest coal-fired power plants in operation worldwide.
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Frequently asked questions
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J-POWER Isogo Thermal Power Station: where is it located?
J-POWER Isogo Thermal Power Station: what is there to see?
J-POWER Isogo Thermal Power Station: when is the best time to visit?
J-POWER Isogo Thermal Power Station: why is it worth visiting?






















