| 1973-1975: |
Research Associate, Hokkaido University, Sapporo |
| 1975-1977: |
Lecturer, Hokkaido University, Sapporo |
| 1977-1985: |
Associate Professor, Hokkaido University, Sapporo |
| 1977-1979: |
Alexander von Humboldt Research Fellow, MPI fuer FKF, Stuttgart |
| 1978: |
Visiting Fellow, Physics Department, Nottingham University, Nottingham |
| 1983: |
Visiting Professor, Institute of Solid State Physics at KFA, Juelich |
| 1986-2008: |
Professor, Department of Applied Physics, Hokkaido University |
| 2000: |
Visiting Professor, Physics Department, University of Montpellier |
| 2000: |
Visiting Professor, Chemistry Department, University of Cambridge |
| 2002-2003: |
Guest Professor, Department of Physics, University of Tokyo, Tokyo |
| 2002: |
Visiting Professor, MPI for PKS, Dresden |
| 2006: |
Visiting Professor, Physics Department, Sophia University, Tokyo |
| 2006: |
Visiting Professor, Physics Department, Fudan University, Shanghai |
| 2008: |
Advanced Scholar, Physics Department, Fudan University, Shanghai |
| 2008: |
Guest Scientist, Argonne National Laboratory, Argonne |
| 2008: |
Research Fellow, Toyota Physical and Chemical Research Institute, Nagoya |
