| 2015-2016 | Executive Advisor to the President |
| 2014-2016 | Director, Osaka University Hospital |
| 2014-2015 | Vice President, Osaka University |
| 2012-2014 | Advisor to the Executive Vice Presidents |
| 2010-2014 | Vice Director, Osaka University Hospital |
| 1997~ | Professor and Chairman, the Department of Hematology and Oncology, Osaka University Graduate School of Medicine |
| 1988-1990 | Research Associate, Division of Tumor Immunology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA |
| 1988-1986 | Assistant Professor, the Second Department of Internal Medicine, Osaka University Medical School |
| 1985-1988 | Assistant Professor, the Department of Tumor Pathology, Biomedical Research Center, Osaka University Medical School |
| 1984-1985 | Medical Staff, the Second Department of Internal Medicine, Osaka University Medical School |
| 1983-1984 | Medical Staff in Division of Internal Medicine, The Center for Adult Diseases, Osaka, Japan |