Mitsubishi Corp. finalized a $7.5 billion acquisition of Dallas-based Aethon Energy Management’s Haynesville Shale assets this week, as another Japanese conglomerate moved to secure natural gas from northwest Louisiana for its LNG supply chain. Tokyo-based Mitsubishi is the latest Japanese multinational energy company to buy production in north Louisiana following JERA’s February close on a $1.5 billion purchase of the South Mansfield gas field and supporting infrastructure from Williams and GeoSouthern Energy affiliates, both U.S.-based companies. Taken together, Japanese multinationals will produce an estimated 4.5 billion cubic feet per day or about 30%-35% of the Haynesville region’s total natural gas...