Yokogawa Test & Measurement Corporation is a Japanese manufacturer of precision test, electrical measurement, and analysis instrumentation. Established in 1954 and operating as a core subsidiary of Yokogawa Electric Corporation, the company is headquartered in Hachioji, Tokyo.
Yokogawa Test & Measurement maintains regional branch offices in Nagoya, Osaka, and Fukuoka, complemented by an international sales, service, and ISO/IEC 17025 calibration lab network covering the Americas, Europe, and the Asia-Pacific region. The organization specializes in power measurement, signal acquisition, and optical spectrum characterization.