- Researcher Nippon Electric Company Ltd., Kawasaki-Shi, Kanagawa, Japan, 1969-1982, research supervisor Japan, 1982-1984. Research manager Nippon Electric Corporation Corporation, Kawasaki-Shi, 1984-1987, manager Minato-Ku, Tokyo, 1987-1991, chief engineer, 1991-1996. Professor computer science Takushoku University Hachioji Shi, Tokyo, since 1996.
Member Institute of Electrical and Electronics Engineers, American Association for the Advancement of Science, Association Computing Machinery, Mathematics Society Japan, Institute Electronics, Information and Communications Engineers Japan (Excellent Paper award 1985, 88), Information Processing Society Japan, New York Academy of Sciences.
1969 - 1982
1982 - 1984
1984 - 1987
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