Daido Signal Co., Ltd. engages in the manufacture, sale, maintenance, and repair of railway signal safety devices, electrical equipment, and other mechanical devices. It operates through the following business segments: Railway Signal, Industrial Machinery, and Real Estate. The Railway Signal segment manufactures and sells railway signal equipment. The Industrial Machinery segment manufactures and sells telecommunication equipment. The Real Estate segment leases real estate properties. The company was founded in November 1929 and is headquartered in Tokyo, Japan.