Intern, Dept. of Surgery and Cardiovascular Surgery, National Nagoya Hospital, Nagoya (1994-1996)
Resident, Dept. of Cardiovascular Surgery, National Cardiovascular Center, Osaka (1996-1998)
Resident, Dept. of Cardiothoracic Surgery, University of Tokyo Hospital, Tokyo (1998-2003)
Lecturer of the Dept. of Pharmacology, Aichi Medical University (1999-2003)
Surgeon, Dept. of Cardiovascular Surgery, Japanese Red Cross Medical Center, Tokyo (2000)
University of Tokyo, graduate school of medicine (Ph.D. 2003)
Dept. of Cardiac Surgery, Children Hospital Boston (2003-2005)
Dept. of Cardiac Surgery, London Health Science Centre, University of Western Ontario (2005-7)
Assistant Professor, Dept. of Cardiothoracic Surgery, University of Tokyo