| May 1982-March 1989 |
Clinical and research assistant in the Department of Neurosurgery,
the University of Tokyo Hospital (Director Prof. K Takakura). Including 3 year
rotation in the Department of Neurosurgery, Mitsui Memorial Hospital (Director;
Dr. Takanori Fukushima) 1984-1987 |
| July 29, 1988 |
Japanese Board of Neurological surgeon |
| April 1989-December 1990 |
Clinical Fellowship in the Department of Neurosurgery, Mayo
Clinic (Director; Prof. T M Sundt Jr.) |
| April 1995-December 1995 |
Skull base Fellowship/Instructor in the Department of Neurosurgery,
George Washington University (Director; Prof. LN. Sekhar) |
| January, 1996-June, 1996 |
Chief Resident Associate in Neurosurgery, Mayo Clinic |
| July, 1996-December, 1996 |
Stereotactic and Radiosurgery Fellow at the Mayo Clinic (Director:
Prof. Robert J. Coffey) |
| January 1991-March 1995 |
Resident fellow in the Department of Neurosurgery, Mayo Clinic (Director; Prof. D G Piepgras) |
| January, 1997-May,1997 |
Director of Neurosurgery at the Teraoka Memorial Hospital, Hiroshima, Japan (President: Akira Teraoka, MD) |
| June, 1997 |
Visiting Fellow for Endoscope Assisted & Minimally Invasive Surgery at the Department of Neurosurgery, University of Mainz, Germany (Director: Prof. A Perneczky) |
| June, 1997-Aug.31, 1998 |
Assistant Professor at the Department of Neurological Surgery George Washington University (Chairman: Laligam N. Sekhar, MD): Co-Director Spine Center George Washigton University Medical Center |
| February 5, 1998-Aug. 31, 1998 |
Clinical Assistant Professor Departement of Neurosurgery University of Maryland (Chairman: Howard Eisenberg, MD) |
| May 1998-Aug. 31, 1998 |
Co-director Minimally invasive cranial base surgery training center and laboratory |
| Sept.1, 1998- May 15, 2001 |
Assistant professor, Director of Neurosurgery ward |
| May 16, 2001-March 31,2006 |
Associate Professor Department of Neurosurgery, University of Tokyo (Chairman: Takaaki Kirino, MD, PhD) |
| April 1,2006-Dec. 2012 |
Director, Department of Neurosurgery and Stroke Unit, NTT Medical Center Tokyo |
| Jan 1, 2013-March 30, 2023 |
Professor & Chairman, Department of Neurological Surgery, Nippon Medical School, Faculty of Medicine |
| April 1, 2019-March 30, 2023 |
Dean, Graduate School of Medicine, Nippon Medical School |
| April 1, 2023- |
Professor, Emeritus, Nippon Medical School, Senior Neurosurgeon, Teraoka Memorial Hospital, Head, Teraoka Geriatric Health Care Center |
JAPANESE