Japan’s JERA Co. Inc., the nation’s largest power generation company, has agreed to acquire 100% of the South Mansfield gas asset in Louisiana’s Haynesville Shale from Williams and GEP Haynesville II, LLC, in a deal valued at $1.5 billion.
The acquisition, made through subsidiary JERA Americas Inc., marks a major step in the company’s strategy to build a diversified and resilient global energy portfolio. The South Mansfield asset currently produces more than 500 MMcf/d and includes 200 undeveloped locations, with plans to ramp production to 1 Bcf/d over the coming years.
Located in western Louisiana, the South Mansfield acreage benefits from established midstream infrastructure and close proximity to Gulf Coast LNG export terminals and emerging data center power hubs, aligning with JERA’s long-term focus on integrated natural gas and low-carbon fuel supply chains.
“The Haynesville acquisition is a strategic addition to our asset portfolio, enabling us to advance our supply chain expertise while deepening our commitment to the U.S. energy market,” said John O’Brien, CEO of JERA Americas.
Ryosuke Tsugaru, JERA’s Chief Low Carbon Fuel Officer, added that the transaction “enhances diversification across the LNG value chain and reinforces JERA’s mission to provide stable, secure energy globally.”
The move follows JERA’s recent signing of the largest U.S. LNG offtake agreement by a single buyer—5.5 million tonnes per year for 20 years—and its progress on the Blue Point low-carbon ammonia project. The company currently holds full or partial ownership in 10 U.S. power generation assets, underscoring its expanding role in the American energy landscape.
The Haynesville deal is subject to customary closing conditions and regulatory approvals.
