NS United Kaiun Kaisha, Ltd., together with its subsidiaries, engages in the marine transportation services and related business in Japan and internationally. The company operates through two segments, International Shipping Business and Coastal Shipping Business. The International Shipping Business segment provides transportation of materials including iron ores, coking coals, steel products, and nonferrous metal ores by bulk carriers; transportation of LPG and other petroleum products by tankers; and vessel leasing, as well as energy resources transport services; and tramp chartering services. The Coastal Shipping Business segments engages in the transportation of materials comprising steel products, limestone, and cement by bulk carriers in domestic water areas; transportation of LPG, LNG, and other petroleum products by tankers; and vessel leasing. As of June 25, 2025, the company operated a fleet of 140 ocean going and 80 coastal vessels. NS United Kaiun Kaisha, Ltd. was incorporated in 1950 and is headquartered in Tokyo, Japan.