Career History April 1986 Entered Showa University School of Medicine, Tokyo, Japan March 1992 Graduated from Showa University School of Medicine May 1992 Passed the 86th National Medical Licensing Examination, Japan May 1992 Joined the Department of Neurosurgery, Showa University School of Medicine May 1992 Entered the Graduate School of Medicine, Showa University April 1993 Assigned to Nishijima Neurosurgical Hospital, Japan April 1994 Assigned to National Tokyo Second Hospital (currently National Center Hospital, Tokyo Medical Center), Japan March 1996 Completed the Graduate School of Medicine, Showa University April 1996 Research Associate (Non-tenured), Department of Neurosurgery, Showa University School of Medicine July 1997 Research Associate, Department of Neurosurgery, Showa University School of Medicine September 2002 Research Associate, Department of Emergency Medicine, Showa University School of Medicine April 2006 Senior Lecturer and Chief of Clinical Services, Department of Emergency Medicine, Showa University School of Medicine October 2010 Research Fellow, University of Washington, Seattle, WA, USA October 2010 Visiting Associate Professor, Division of Gerontology and Geriatric Medicine, University of Washington, Seattle, WA, USA June 2011 Senior Lecturer and Chief of Clinical Services, Department of Emergency Medicine, Showa University Fujigaoka Hospital September 2013 Lecturer and Chief of Clinical Services, Department of Emergency Medicine,