
| 1972 | B.Eng., Kyoto University | 
| 1974 | M.Eng., Kyoto University | 
| 1974 | Research Associate, Hokkaido University | 
| 1985 | D.Eng., University of Tokyo | 
| 1985 | Visiting Fellow, IBM Thomas J. Watson Research Center(~1986) | 
| 1990 | Professor, Faculty of Engineering, Hokkaido University | 
| 1995 | Director, Meme Media Laboratory, Hokkaido University(~2013) | 
| 1998 | Professor, Graduate School of Informatics, Kyoto University(~2000) | 
| 2004 | Professor, Graduate School of Information Science and Technology, Hokkaido University Visiting Professor, National Institute of Informatics  | 
| 2013 | Project Professor(~2016) / Professor Emeritus, Hokkaido University(~2016) | 
| 2017 | MI Research Advisor, National Institute of Material Science(~2019) Visiting Professor, Institute for Catalysis, Hokkaido University  | 
| 2018 | Adjunct Professor, Department of Computing Science, University of Alberta | 
| 2019 | Project Researcher, Comprehensive Research Organization for Science and Society  | 
Database Theory, Database Machine, Knowledge Media, Big Data Applications, Social CPS
Fellow, Honorary Member, Japan Society for Software Science and Technology,
 Fellow, Information Processing Society of Japan,
 etc.