Daihen Corp. engages in the manufacture, sale, and repair of electric power transmission and distribution products. It operates through the following segments: Power Equipment, Welding and Mechatronics, Semiconductor Related Equipment, and Others. The Power Equipment segment produces and supplies transformers, power distribution equipment, switches, surveillance and control systems, and dispersed power equipment. The Welding and Mechatronics segment produces and sells electric welding machines, plasma cutting machine, industrial air purifiers, and industrial-use robots. The Semiconductor Related Equipment segment offers high-frequency power sources and clean transfer robots. The Others segment deals with real estate leasing. The company was founded by Aizo Kobayashi on December 1, 1919 and is headquartered in Osaka, Japan.