1995 - 1997 Okinawa Chubu Hospital, Okinawa, Japan: Resident
1997 - 2001 Department of Neurology, Graduate School of Medicine, Chiba University, Japan: Doctoral Candidate
1997 - 2002 Department of Neurology, Chiba University Hospital, Chiba, Japan: Clinical Fellow
2002 - 2003 Department of Neurobiology, Graduate School of Medicine, Chiba University, Chiba, Japan: Assistant Professor
2003 - 2012 Department of Neurology, Chiba University Hospital, Chiba, Japan: Assistant Professor
2012 - 2018 Neuro-urology and Continence Center, Dokkyo Medical University, Tochigi, Japan: Associate Professor and Vice-Director
2012 - 2018 Department of Neurology, Dokkyo Medical University, Tochigi, Japan.: Associate Professor
2012 - 2018 Department of Urology, Dokkyo Medical University, Tochigi, Japan: Associate Professor
2012 - Present Department of Neurology, Chiba University Hospital, Chiba, Japan: Part-time Lecturer
2017 - Present Honorary Consultant and clinical researcher in Uro-Neurology, The National Hospital for Neurology and Neurosurgery and University College London (UCL) Institute of Neurology, Queen Square, London United Kingdom
2018 - Present Department of Neurology, School of Medicine at Narita, International University of Health and Welfare, Chiba, Japan: Professor