Ishii Iron Works Co., Ltd. operates as an engineering, procurement, and construction contractor worldwide. The company constructs low-temperature tanks and terminals; LNG tanks and satellite terminals; spherical tanks and gas holders; and atmospheric storage tanks, as well as provides maintenance services. It also provides wet and dry seal type gas holders; leisure facility works, including stainless steel swimming pool facilities, adventure sliders and coasters, tile and running pools, and tunnels, as well as swimming pools with moving floor, artificial waves, and flowing systems; and specialized construction works. In addition, the company engages in the anticorrosive film and waterproofing construction of reservoirs; and seismic analysis; and provision of waterworks equipment, such as emergency drinking water tanks, elevated water tanks, and water distribution pools, as well as environmental equipment comprising sludge digestion gas systems, combustion furnaces for surplus gas, gas processing facilities for waste, and waste disposal site gas processing facilities. Further, it provides gas generation systems that include generation plants for city gas and P-13A facilities; and steel structures, which comprise steel frames and towers for iron bridges, steel chimneys, artworks, and silos for crops, as well as rust inhibitors. Additionally, the company offers condominiums, logistics facilities, commercial facilities, and solar power generation equipment. It serves companies dealing with petroleum, chemical engineering, steel mill, electric and gas power, government authority, and various public organizations. The company was founded in 1900 and is headquartered in Tokyo, Japan.