World Power Plants

Genkai Nuclear Power Station3,478 MW Nuclear

NuclearVerified: Feb 2026

The 玄海原子力発電所, or Genkai Nuclear Power Plant, is a cornerstone of energy generation in Japan, located in the Kyushu region at coordinates 33.5152, 129.8354. This nuclear facility has a substantial capacity of 3,478 MW and is operated by 九州電力 (Kyushu Electric Power Company). Since its commissioning in 1975, the plant has played a crucial role in supplying electricity to the local grid, significantly contributing to Japan's efforts in achieving energy independence and sustainability. Utilizing advanced boiling water reactor (BWR) technology, the Genkai Nuclear Power Plant converts nuclear energy into electricity with high efficiency, which is essential for meeting the energy demands of the region. Its strategic location enhances its importance, as it provides a stable source of power to support both residential and industrial consumption. The operational significance of this facility aligns with Japan's energy policy, which promotes nuclear energy as a vital part of the energy mix to reduce reliance on fossil fuels and combat climate change. The Genkai plant exemplifies the country’s commitment to clean energy generation while ensuring energy security. As Japan looks to the future, the 玄海原子力発電所 remains a key player in the nation's energy landscape, highlighting the role of nuclear power in driving forward a sustainable energy agenda.

Capacity
3,478 MW

3.48 GW

Commissioning Year
1975

51 years old

Owner
九州電力
Location
33.5152°, 129.8354°

Japan, Asia

Context & rankings
  • 23. largest of 662 plants in Japan
  • #256 worldwide by installed capacity
  • #81 of 514 Nuclear plants worldwide
  • 1.01% of the installed capacity of Japan
Age & fleet comparison

51 years in operation

Nuclear fleet average: 38.1 years

Operator portfolio

Kyushu Electric Power operates 20 plants totalling 25,114 MW

Regional density

42 plants within 100 km, 13,192 MW combined

Nearest plant: Karatsu Power Plant (12.8 km)

Data provenance

Location

Coordinates:: 33.515160, 129.835427
Open in Google Maps
Carbon Footprint

Zero Direct Emissions

Genkai Nuclear Power Station is a nuclear power plant producing approximately 25897 GWh of clean electricity per year with zero direct CO₂ emissions during operation.

Lifecycle emissions: ~12 g CO₂/kWh (manufacturing, transport, decommissioning)

Technical Details

Primary Fuel Type
Nuclear
Energy Source
Non-Renewable
Country
Japan
Continent
Asia
Data Source
Global Power Plant Database

Overview of the Genkai Nuclear Power Plant in Japan

The Genkai Nuclear Power Plant, known in Japanese as 玄海原子力発電所, is a significant facility located in the Saga Prefecture of Japan. With a total generating capacity of 3,478 megawatts (MW), it plays a crucial role in the country's energy landscape. Owned and operated by Kyushu Electric Power Company (九州電力), the plant was commissioned in 1975 and has been a vital source of nuclear energy for the region and the nation at large. As Japan continues to navigate its energy needs, particularly in the aftermath of the Fukushima disaster in 2011, the Genkai plant remains a focal point in discussions about energy policy and sustainability.

The Genkai Nuclear Power Plant utilizes nuclear fuel, primarily enriched uranium, to generate electricity. Nuclear power plants like Genkai operate on the principle of nuclear fission, where the nucleus of an atom is split into smaller parts, releasing a significant amount of energy in the form of heat. This heat is used to produce steam, which drives turbines to generate electricity. The plant's reactors are designed to maintain high levels of safety and efficiency, benefiting from advancements in nuclear technology over the decades. The use of uranium as fuel allows the plant to produce large quantities of electricity with relatively low operational costs, contributing to the stability of the energy supply in Japan.

Environmental considerations surrounding the Genkai Nuclear Power Plant are multifaceted. On one hand, nuclear energy is often lauded for its low greenhouse gas emissions compared to fossil fuel-based power generation, contributing to Japan's efforts to reduce its carbon footprint. However, the management of nuclear waste and concerns regarding potential accidents remain critical issues. The plant's operators must adhere to stringent safety protocols to mitigate the risks associated with nuclear energy production. Additionally, public sentiment towards nuclear power in Japan has been heavily influenced by historical events, necessitating ongoing transparency and communication from the plant's management to build trust with the surrounding communities.

Regionally, the Genkai Nuclear Power Plant serves as a major economic driver, providing jobs and contributing to local infrastructure development. It has a significant impact on the local economy, not only through direct employment opportunities but also by stimulating related industries, including construction, maintenance, and services. The plant's operation is vital for ensuring a reliable electricity supply in Kyushu, an area that heavily relies on this energy source. As Japan continues to transition towards a more sustainable energy framework, the Genkai Nuclear Power Plant remains a pivotal component of the broader strategy to balance energy demands with environmental responsibilities and safety considerations.

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Total Plants
342.8 GW
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