Maezawa Kasei Kogyo Co., Ltd.

Maezawa Kasei Kogyo Co., Ltd. is a Japanese manufacturer of PVC products and systems for water infrastructure, headquartered in Tokyo with branches and sales offices across Japan. Its product portfolio serves water supply, sewerage and drainage, environmental equipment, plant-related moulded products and disaster prevention, encompassing TS and HI joints, special fittings, box products, hydrant posts, butterfly valves, MS valves, pipes, lids and protective covers.

The company also supplies complete water treatment systems, including carrier fluidised bed, membrane separation activated sludge, advanced nitrogen and phosphorus removal, physicochemical treatment and water circulation systems, with total support from installation through operation and expansion. Educational resources such as its waterworks school materials, calculation apps and electronic catalogues support designers and contractors, while manufacturing plants including the Kumagai factory, in-house research and development and sustainability initiatives underpin its position serving Japanese water utilities.