Ishii Iron Works Co., Ltd. is a company mainly engaged in the steel structure, gas and real estate businesses. The Company operates in two business segments. The Steel Structure segment is engaged in the design, manufacturing, installation and testing of oil tanks and other storage tanks, chemical industrial machinery and equipment, as well as steel structures, such as steel frames, pools and others. The Real Estate segment is involved in the leasing of real estate properties. As of March 31, 2014, the Company had four subsidiaries and two associated companies.