Japan’s largest power producer, JERA Co., has announced a landmark $1.5 billion acquisition of natural gas assets in the United States, marking its official entry into the American shale gas market. The deal underscores JERA’s push to strengthen its global energy portfolio and secure stable fuel supplies as the world transitions toward cleaner energy sources.

Under the agreement, JERA will acquire 100% of the interests held by pipeline operator Williams and GEP Haynesville II in the South Mansfield gas field, located in Louisiana’s Haynesville Shale basin — one of the most prolific natural gas regions in the U.S. GEP Haynesville II is a joint venture between GeoSouthern Energy, backed by Blackstone, and Williams.

The Haynesville asset currently produces over 500 million standard cubic feet of gas per day (MMscfd) and includes around 200 undeveloped locations. JERA said it plans to ramp up output to 1 billion cubic feet per day (Bscfd) in the coming years, leveraging the site’s well-established infrastructure and proximity to key Gulf Coast LNG export terminals and data center hubs.

In a statement, Ryosuke Tsugaru, JERA’s Chief Low-Carbon Fuel Officer, described the acquisition as a strategic milestone.

“The Haynesville acquisition substantially expands our partnerships in the United States,” he said. “The benefits are clear: enhanced diversification for JERA’s LNG value chain, expanded global reach across the gas value chain, and overall risk mitigation in a volatile energy market.”

JERA highlighted that the deal aligns with its goal of building a diversified and resilient asset portfolio, positioning natural gas as an “essential transitional fuel” in global decarbonization efforts.

The acquisition also deepens JERA’s growing presence in the U.S. energy landscape. The company — a joint venture between Tokyo Electric Power and Chubu Electric Power — has been aggressively expanding its overseas assets. In recent months, it has signed long-term LNG offtake agreements totaling 5.5 million metric tons per year and a letter of intent to source gas from Alaska’s $44 billion LNG export project.

The latest move also coincides with Japan’s rising energy needs, particularly as data centers and artificial intelligence (AI) infrastructure drive a surge in electricity demand. Owning production assets gives JERA more control over its supply chain and helps shield it from global market volatility.

The broader U.S.–Japan energy collaboration continues to deepen. Just last year, Tokyo Gas acquired Texas-based Rockcliff Energy for $2.7 billion, and Williams recently announced a $1.9 billion investment in Woodside Energy’s LNG export terminal under construction in Louisiana.

With this latest acquisition, JERA reinforces its strategic foothold in the U.S. energy sector — a move that not only diversifies its fuel sources but also strengthens Japan’s long-term energy security amid an evolving global energy transition.