Bachelor of Science in Technology, Tokyo University, 1962. Doctor of Philosophy in Engineering, Tokyo University, 1981. Master of Business Administration, Massachusetts Institute of Technology, 1978.
Joined Nippon Telegraph & Telephone Corporation, Tokyo, 1962, director representative office Nippon Telegraph and Telephone America New York City, 1986—1989, founder, Chief Executive Officer Nippon Telegraph and Telephone America Inc., 1987—1988, senior manager, business strategy planning Headquarters, 1989—1990, senior executive mobile communications, 1990—1991, executive manager technical research department, general planning Headquarters, 1991—1992, senior vice president, general manager Kanto regional communications sector, 1992—1995, executive vice president service engineering Headquarters, 1995—1996, senior executive vice president business communications Headquarters, 1996—1997. Senior executive vice president Nippon Telegraph and Telephone DoCoMo, Inc. (formerly Nippon Telegraph and Telephone Mobile Communications Network, Inc.), 1997—1998, president, Chief Executive Officer, 1998—2004, corporation advisor, since 2004.
President Japan Aerospace Exploration Agency (JAXA), since 2004. Regional chief Institute Electronics & Communications Engineers, Japan, 1995—1996. Member National Space Activities Commission, 2001—2004.
Married; 2 children.