Okamoto Machine Tool Works, Ltd. manufactures and sells grinding machines and semiconductor-related equipment in Japan and internationally. The company operates through the Machine Tools and Semiconductor Related Equipment segments. It offers precision surface, precision form, cylindrical/internal/universal, and specialized grinding machines; semiconductor manufacturing equipment; precision gears and castings; and polishing and slicing machines. The company was founded in 1926 and is headquartered in Annaka, Japan.