Koike Sanso Kogyo (小池酸素工業株式会社) is a company manufacturing gas welding and cutting equipment as well as high-pressure gas. It operates through three main segments: Mechanical Equipment, High-Pressure Gas, and Welding Equipment. The Mechanical Equipment segment provides gas cutting and welding machines as well as product installation, maintenance, and service. The High-Pressure Gas segment offers oxygen, nitrogen, argon, dissolved acetylene, and propane, as well as related medical equipment. The Welding Equipment segment supplies welding rods, electric welding machines, safety equipment, and other products. The company caters to shipbuilding, architecture, construction and industrial machinery, automotive, electrical, medical, food, and other markets.