Bachelor of Science in Engineering, University Tokyo, 1958; Master of Science in Engineering, University Pennsylvania, 1964.
Manager department turbine engineering, Nippon Kokan K.K., Yokohama, Japan, 1973-1980; manager technical research division, Nippon Kokan K.K., Yokohama, Japan, 1980-1986; managing director, Hamai Company Ltd., Tokyo, since 1986. Member Gas Turbine Congress Committee, Tokyo, since 1971.
Member American Society of Mechanical Engineers (life), Japan Society Mechanical Engineers, Gas Turbine Society Japan (certified 1992).
Son of; married Minako Shigemi, March 20, 1967. Children: Rieko, Michiru.