Nagaoka International Corporation manufactures and sells water intake and treatment systems, and screen internals to the oil refining and petrochemical industries in Japan and internationally. It also provides water intake screens for groundwater and other purposes, such as waterworks, industrial facilities, farming, and fish farms; and the technology of water treatment for drinkable and commercial use. The company was founded in 1934 and is headquartered in Osaka, Japan. Nagaoka International Corporation is a subsidiary of HAMADA Co., Ltd.