2010/Apr-2012/Mar Resident in Internal Medicine, National Center for Global health and Medicine, Tokyo, Japan 2012/Apr-2014/Mar Clinical fellow in Cardiology, Department of Cardiology, NTT medical center Tokyo, Tokyo, Japan 2014/Apr-2015/Mar Clinical fellow in Cardiology, Department of Cardiology, The University of Tokyo Hospital, Tokyo, Japan 2015/Apr-2018/Feb Attending Physician, Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan 2018/Mar-2020/Feb Clinical research fellow, Department of Cardiac Surgery University Hospital Zurich, Zurich, Switzerland 2020/Jun- Postdoctoral position, Department of Cardiovascular Medicine, The University of Tokyo Hospital, Tokyo, Japan