TOKYO and HOUSTON — JERA Co. Inc. announced that its subsidiary, JERA Americas Inc., has closed on its previously announced agreement to acquire 100% of the South Mansfield upstream asset in the Haynesville Shale basin in western Louisiana.
The acquisition, referred to as the Haynesville Acquisition, includes the purchase of interests from Williams Upstream Holdings and GeoSouthern Energy Corp. Under terms disclosed in October 2025, the transaction involved an upfront investment of $1.5 billion.
The South Mansfield asset is located in the Haynesville Shale, a major U.S. natural gas-producing region, and benefits from proximity to Gulf Coast infrastructure and existing pipeline access. Development plans include capturing and sequestering associated carbon dioxide from production, aligning with JERA’s lower-carbon strategy.
The deal expands JERA’s investment footprint across Louisiana, where the company has committed billions of dollars across natural gas, liquefied natural gas, renewables, advanced fuels and carbon reduction technologies.
“Louisiana is a strategic priority for JERA, and the Haynesville Acquisition — in addition to our other commitments across the state — and underscores our intention to be a long-term partner in Louisiana’s energy economy,” said John O’Brien, chief executive officer of JERA Americas. “We will approach Haynesville with the highest commitment to safety, operational excellence, and respect for the communities where we work, and we look forward to building lasting relationships as we continue expanding our presence here.”
O’Brien added that the company’s expanding portfolio reflects a long-term commitment to investing in the state, supporting communities and strengthening a reliable, more sustainable energy system.
Among JERA’s major Louisiana projects is the Blue Point low-carbon ammonia project in Ascension Parish, developed in partnership with CF Industries and Mitsui & Co.. The facility is designed to produce approximately 1.4 million metric tons of ammonia annually using natural gas as feedstock and carbon capture and storage technology.
The company also developed the 300-megawatt Oxbow Solar Farm in Pointe Coupee Parish, described as the largest solar installation in Louisiana. The project supported approximately 400 construction jobs over two years and continues to generate long-term economic benefits for the local community.
In addition, JERA holds liquefied natural gas offtake agreements, including 1 million tons per annum from Cameron LNG and contracts for up to an additional 3 million tons per annum of future LNG offtake from Louisiana facilities.
Through its venture capital arm, JERA Ventures, the company has partnered with Newlab New Orleans to support development and commercialization of carbon capture technologies targeting emissions from gas-fired power generation.
Headquartered in Houston, JERA Americas is the U.S. subsidiary of Tokyo-based JERA, which provides approximately 30% of Japan’s electricity and is one of the world’s largest LNG buyers.