1. Professor and Chairman, Department of Anesthesiology, Hokkaido University School of Medicine.
2. Instructor in Anesthesiology, Hokkaido University Hospital.
3. Associate Professor in Anesthesiology, Hokkaido University School of Medicine.
4. Principal Engineer, Department of Biomedical Engineering, Southwest Research Institute.
5. Senior Research Engineer, Mechanical Design and Development Program, SRI International.