(1989 - 1989) | Visiting Professor, Department of Chemistry, University of Arizona, (USA), collaborated with Prof. David F. O'Brien |
(1992 - 1994) | Lecturer, Kumamoto Women's University. |
(1994 - 2000) | Lecturer, Kumamoto Prefectural University. |
(1998 - 1999) | Division Head of Materials & Life Sciences, Kumamoto University. |
(1999 - 1999) | Visiting Professor, Mendeleyev Univ. of Chem.l Tech. (Russia), collaborated with Prof. Galina V. Popova |
(2000 - 2000) | Visiting Professor, University of Alberta (Canada), collaborated with Prof. Zhenghe Xu Visiting Professor, University of Arizona (USA), collaborated with Prof. Rein Kilkson |
(2001) | Visiting Professor, Kyoto University |
(2001) | Department Head of Applied Chemistry & Biochemistry, Kumamoto University. |
(2001 - ) | Visiting Researcher, Japan Atomic Energy Research Institute |
(2003) | Lecturer, The Open University of Japan. |
(2003) | Lecturer, Graduate School of Science & Technology, Kumamoto University. |
(2004 ) | Visiting Professor, Russian Academy of Science, St. Petersburg (Russia), collaborated with Prof. Tatiana Tennikova |
(2007 - 2009) | Visiting Professor, Kinki University, Institute of Advanced Technology |
(2017 - ) | Visiting Professor, Kyoto University, Graduate School of Energy Science |