YKT Corp. engages in the import and export of electronic equipment, machine tools, measuring equipment, welding machines, and industrial machinery. It operates through the Electronics Equipment and Machine Tools, and Optoelectronic Device segments. The Electronics Equipment and Machine Tools segment markets electronic component mounting systems, machine tools, measuring equipment, welding machines, and industrial machineries. The Optoelectronic Device segment sells optical communication-related products, research laser equipment, and laser processing devices. The company was founded by Keizo Yamamoto in 1924 and is headquartered in Tokyo, Japan.