Zuiko Corp. engages in the manufacture and sale of sanitary napkin machines, diaper machines, and its ancillary machine parts. It operates through the following segments: Sanitary Materials Production Systems and Other Production System. The Sanitary Materials Production Systems operates diaper production machines, sanitary napkin production machines and pulp recycling machines. The Other Production System develops and offers new machines to produce pet sheets, wet wipes, 3D masks, nursing pads, puffs, and a variety of daily-life products. It also provides engineering advice on product development and manufacturing productivity in addition to production hardware. The company was founded on May 1, 1946 and is headquartered in Osaka, Japan.