Electric engineer. Doctor of Engineering. Emeritus professor at Tohoku University. Born in Tokyo, he graduated from Tokyo University and was appointed in structor at Tohoku University (1913). Studied in Europe and the United States (1917-19) as a student of the Education
Ministry. Became professor (1919) and received his doctorate (1924). Visited Europe and the United States (1931) for inspection. Was appointed dean of the Engineering Department of Tohoku University (1932). Has been director of the Telecommunications Research Institute since its establishment (1935). After five years' research, he perfected an underwater telecommunication system which was more efficient than the traditional one. It utilized super short-waves generated by magnetic distortion.