Assistant Professor, Department of Psychiatry, University of Ryukyu, Okinawa, Japan
Associate Professor, Departments of Psychiatry and Neuroscience, Director of the Mood and Anxiety Disorders Program, Mount Sinai Hospital, New York, NY
Professor at the London Sleep Clinic and Honorary Fellow at the Institute of Neurology, University of London, London, England
Assistant Professor, Department of Psychiatry, University of Ryukyu, Okinawa. President, Arakaki Hospital, Okinawa
Professor and Chairman, Department of Psychiatry, Yokohama City University School of Medicine, Yokohama, Japan, and, as of April 1, 2010, also now President of Yokohama City University Hospital Medical Center, and Dean of the Graduate School of Medicine, Yokohama City University Graduate School of Medicine,Yokohama, Japan
Professor and Chair, Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea