Okamoto Machine Tool Works, Ltd. engages in the manufacture and sale of grinding machines and semiconductor production equipment. Its operations are carried out through the Machine Tools and Semiconductor-related Equipment segments. The Machine Tools segment handles the manufacture and sale of grinding machines. The Semiconductor-related Equipment segment offers grinding machine used for processing semi conductors and electronic components, glass substrate polishing equipment, ingot processing equipment for solar power generation, and slicing machines. The company was founded by Kakusaburo Okamoto in November 1926 and is headquartered in Annaka, Japan.