K&O Energy Group Inc. engages primarily in the development, production, supply, and sale of natural gas and iodine resources in Japan. The company operates through two main segments: the Gas segment, which encompasses the development, collection, and sale of natural gas; city gas business; manufacture and sale of compressed natural gas; and sale of liquefied petroleum gas; and the Iodine segment, which involves the production and sale of iodine and iodine compounds as well as the sale of brine. Additional operations include the sale of gas appliances, plumbing work associated with gas sales, and electric power business.
Founded on January 6, 2014, through the integration of Kanto Natural Gas Development Co., Ltd. and Otaki Gas Co., Ltd., K&O Energy Group Inc. maintains its headquarters at 661 Mobara, Mobara City, Chiba Prefecture, Japan, with a Tokyo office in Chuo City. The company lists on the Tokyo Stock Exchange Prime Market under ticker 1663 and oversees subsidiaries such as K&O Iodine Co., Ltd. (iodine production), WELMA Co., Ltd. (well drilling for geothermal and hot springs), KNG America, Inc. (oil and gas exploration in the United States), and Shinei Engineer Corporation (gas equipment design). Its geographic footprint centers on Japan, particularly Chiba Prefecture for resource extraction, with international activities via U.S. operations in Texas and New Mexico.
In recent developments, K&O Energy Group Inc. agreed in October 2025 to acquire a 33.40% stake in Mitsui Mineral Development Engineering Co., Ltd. from Mitsui Kinzoku Company, Limited, expanding its capabilities in mineral development engineering. The company also announced an increase in its dividend payout for the period ending March 2026 to ¥26.00 per share from the prior year's level, reflecting strengthened financial performance. These moves align with ongoing efforts to diversify and sustain operations in clean energy and resource supply amid Japan's energy transition.