Director of Sapporo Azabu Neurosurgical Hospital 
Visiting Professor, Depatment of Neurosurgery, Hokkaido University, Sapporo, Japan

Education: 
College of General Education, Univ. of Hokkaido 1975-1978
Faculty of Medicine, Univ. of Hokkaido 1978-1981
Residency: Neurosurgery 1981-1986
Post-doctorial Fellowship:
Neurosurgery: University of Hokkaido 1986-1991
Research Fellow: University of California Davis 1988-1990 
Academic Positions: 
University of Hokkaido
Assistant Professor of Neurosurgery 1991-2002
Associate Professor of Neurosurgery 2002- 2007
Clinical Professor of Neurosurgery 2007-2013
Prize: Tsuru Award, Neurospinal Society of Japan (NSJ) (1996)
Hokkaido Medical Association Award (2026)
Hokkaido Governor’s Award (2026)
Membership: 
Japan Neurosurgical Society
Japanese Congress of Neurological Surgeons
Japanese Society of Spinal Surgery (Executive Committee)
Japan Medical Society of Spinal Cord Lesion (Executive Committee)
AO Spine Japan (Council)
Asia Spine (Executive Committee)
AANS (International member)
President of 7th APCSS (2013)
President of 30th JPSS (2015)
President of 59th JSSCM (2024)
Main Research Field
Cervical OPLL Spinal cord tumors
Syringomyelia Spinal AVM