Graduated from Kyoto University, Faculty of Medicine. After residency, I got Ph.D. by the research of stem cell transplantation in the brain. Experience clinical fellow at Toronto, Canada, for vascular and general neurosurgery, and research fellow at Weill Cornell, NY, USA, for skull base laboratory. I have a license of certified neurosurgeon, certified vascular neurosurgeon, and certified neuroendovascular surgeon. My current academic works are on the comparison and combination of open surgery and endovascular therapy for intractable cerebrovascular diseases, safe skull base surgery, and clinical research on aneurysmal subarachnoid hemorrhage.