- 2007 - Oct - present Associate Professor, Department of Nanobio Drug Discovery
- - 2006 2005 Sep - 2006 Jun Assistant Professor, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD
- - 2006 2005 Mar - 2006 Jun Assistant Professor, Department of Pathology, University of Maryland School of Medicine, Baltimore, MD
- 2006 - July - 2007 Sep Assistant Professor, Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University School of Medicine
- - 2005 2003 Apr - 2005 Mar Visiting Assistant Professor, Department of Pathology, University of Maryland School of Medicine, Baltimore, MD
- - 2002 2001 Oct - 2002 Jun Volunteer Faculty, Department of Medicine, University of Maryland School of Medicine.
- 2000 - Apr - Sep Medical staff, Department of Surgery and Surgical Basic Science, Kyoto University Hospital, Kyoto, Japan
- 1992 - 1996 Medical Staff, Department of Surgery, Fukui Red Cross Hospital;Fukui, Japan
- 1996 - Apr - 2000 Mar Graduate, Department of Surgery and Surgical Basic Science, Graduate school of Medicine, Kyoto University; Kyoto, Japan
- 1992 - Jan - Mar Resident, Department of Surgery, Takamatsu Red Cross Hospital; Takamatsu, Japan
- 1991 - Jun - Dec Resident, First Department of Surgery, Kyoto University Hospital;Kyoto, Japan
- 1985 - Apr - 1991 Mar Faculty of Medicine, Kyoto University, Kyoto Japan
- Graduate School of Pharmaceutical Sciences, Kyoto University