2016- Division of Cardiology, Assistant Professor, Yokohama City University Medical Center, Yokohama, Japan 2015-2016 Division of Cardiology, Cardiologist, Yokohama City University Medical Center, Yokohama, Japan 2013-2015 Division of Cardiovascular Disease, Research Fellow, Mayo Clinic 2009-2013 Division of Cardiology, Cardiologist, Yokohama City University Medical Center, Yokohama, Japan 2007-2009 Department of Cardiovascular Medicine, Cardiologist, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan 2005-2007 Fujisawa City Hospital, Cardiologist, Fujisawa, Japan 2003-2005 Resident in Medicine, Yokohama City University 2003 Passed the Examination of National Board