Nippon Aqua Co., Ltd. engages in the development, sale, and installation of insulation materials in Japan. It offers a waterproofing material that is used to prevent leaks, cracks, and deterioration in various buildings, condominiums, multi-storey car parks, warehouses, and wooden houses under Aqua Hazikun brand name. The company is also involved in spray-applied rigid polyurethane foam insulation on buildings apartment buildings, factories, etc. that are made of reinforced concrete, steel-reinforced concrete, or steel-framed construction; and installation of spray-on rigid urethane foam for detached houses. The company was incorporated in 2004 and is headquartered in Tokyo, Japan. Nippon Aqua Co., Ltd. operates as a subsidiary of Hinokiya Group Co.,Ltd.