Professional Career
- 1975 – 1979, Junior Researcher, Institute of Physical and Chemical Research (RIKEN)
- 1979 – 1988, Researcher, Institute of Physical and Chemical Research
- 1988 – 1992, Associate Professor, University of Tsukuba
- 1989 – 1990, JSPS visiting researcher, Johannes Kepler University of Linz, Austria
- 1992 – 2012, Professor of Computer Science, University of Tsukuba
- 2012 -, Professor Emeritus, University of Tsukuba
- 2018 -2021 , Vice-Chairman of the Association of Emeritus Professors of University of Tsukuba
Guest Professor
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- National Institute of Multimedia Education, 2004 – 2005
- Xiamen University, China, 2006 – 2010
Guest Researcher
- Beihang University, China, 2002 – 2004
- National Institute Multimedia Education, 2002 – 2003
Visiting Professor
- University of New South Wales, Australia, August 2005
Visiting Lecturer
- Gunma University, 1990
- Kyushu University. 1992
- Tohoku University, 1992
- Shizuoka University, 1993
- Mie University, 1998
- Kyoto University, 2006
- Future University of Hakodate, 2007 – 2009
- University of Cartage, Tunisia, 2002, 2003, 2004, 2007 – 2013, 2017