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Seikoh Giken Co., Ltd. engages in the manufacture and sale of optical disc molds and optical communications equipment. It operates through the Precision Equipment and Optical Products segments. The Precision Equipment segment provides precision molds such as high heat resistance lenses, molds for automobiles, and optical disks. The Optical Products segment offers optical connectors, cords, attenuators, ferrules, isolators, polishing machines, transmission devices, and optical electric field sensors. The company was founded on June 17, 1972 and is headquartered in Matsudo, Japan.