Nippon Aqua Co., Ltd. develops, sells, and installs insulation materials in Japan. Under the Aqua Hazikun brand, it offers waterproofing material used to prevent leaks, cracks, and deterioration in buildings such as condominiums, multi-story parking garages, warehouses, and wooden houses. The company also applies spray-applied rigid polyurethane foam insulation to reinforced concrete, steel-reinforced concrete, and steel-framed buildings, including apartment buildings and factories, and installs spray-on rigid urethane foam for detached houses. It additionally supplies insulation construction machinery, urethane raw materials, and other auxiliary materials, and undertakes construction projects for condominiums, hospitals, schools, office buildings, factories, data center buildings, cold storage warehouses, and grain warehouses. Incorporated in 2004 and headquartered in Tokyo, Japan, it operates as a subsidiary of Hinokiya Group Co.,Ltd.