Doctor of Philosophy, Waseda University, Tokyo, 1967.
Executive Research and Development supervisor Nippon Telegraph and Telephone, Yokosuka, Japan, 1967—1992. Head BISDN equipment development department, director Siemens Japan, Shinagawa, 1992—1995. Head communications software development division, director Nippon Telecommunications Consulting Limited company, Shibuya, 1995—1998.
Professor, faculty engineering Multimedia University, Cyberjaya, Malaysia, 1998—2001, professor, faculty information technical, since 2003. Professor, faculty distribution & logistic system Ryutsu Keizai University, Ryugasaki, Japan, 2002—2003.
Member of Institute of Electrical and Electronics Engineers, Association Computing Machinery.
Married Takiko Komiya. Children: Noriko Katahira, Nobumasa.