Nagaoka International Corporation develops and sells water intake and treatment systems, and screen internals to oil refining and petrochemical industries in Japan and internationally. It offers screen internals for oil refining, and petrochemical and chemical fertilizer complexes. The company also provides water intake screens for groundwater and other purposes, such as waterworks, industrial facilities, farming, and fish farms; CHEMILES, a treatment for groundwater; and AERSYS, a low-energy aeration system. The company was founded in 1934 and is headquartered in Osaka, Japan. Nagaoka International Corporation is a subsidiary of HAMADA Co., Ltd.