1983-1989 Keio University School of Medicine, Tokyo, Japan (M.D. June, 1989) 1993-1995 Postdoctoral Research Fellow, University of California at San Diego 2003-2011 Assistant Professor, Dept of Internal Medicine, Keio University Sch of Med 2005-2005 Head, Department of Gastroenterology, Kitasato Institute Hospital 2011-2015 Associate Professor, Dept of Internal Medicine, Keio University School of Medicine 2012-present Asian Neurogastroenterology and Motility Association (ANMA) GC member 2015-2019 Professor, Medical Education Center, Keio University School of Medicine 2016-present President of the Japanese Society for Microcirculation 2016-present Guest Professor, Department of Internal Medicine, Tokyo Dental College 2017-2019 Chief, Fellowship Training Center, Keio Univeristy School of Medicine 2017-present International Committee member of American Gastroenterological Association (AGA) 2018-present Steering Committee member of Japanese Medical Specialty Board 2019-2020 Professor, Dept of Gastroenterology and Hepatology, Tokai University Sch of Med 2019-present Director, Division of Postgraduate Clinical Training, Tokai University Hospital 2020-present Professor and Chairman, Division of Gastroenterology and Hepatology, Tokai University School of Medicine 2021-present Guest Professor of Internal Medicine, Keio University School of Medicine 2021-present Director, Department of Gastroenterology and Hepatology, Tokai University Hospital