OKAMOTO MACHINE TOOL WORKS,LTD. is primarily engaged in manufacturing machine tools. The Machine Tools segment manufactures grinding machines, gear machines and gears. It sells directly or through distributors domestically and overseas. The Semiconductor Equipment segment manufactures processing and grinding machines for semiconductors and electronic components, polishing equipment for glass substrates, ingot processing equipment for solar power generation, and slicing machines. It sells directly or through distributors domestically and overseas. As of March 31, 2014, the Company had 10 subsidiaries and two associated companies.