Keiyo Gas Co., Ltd., together with its subsidiaries, engages in the production, supply, and sale of gas in northwest of Chiba Prefecture, Japan. The company operates through Gas, Electricity Retail, and Real Estate segments. It is also involved in the sale of gas equipment; and provision of gas construction and fitting services. The company provides its services to residential, commercial, industrial, and other customers. In addition, it engages in the sale of electricity; gas construction activities; leasing of office spaces and lands; and sale of real estate properties. Keiyo Gas Co., Ltd. was incorporated in 1926 and is headquartered in Ichikawa, Japan.