Dr. Hasegawa graduated from Nippon Veterinary and Life Science University (NVLU) and then completed PhD course. He has been researching, educating, and practicing neurology and neurosurgery at NVLU. Now he is positioned as a Professor of the Laboratory of Veterinary Radiology (undergraduate school) and Veterinary Clinical Neurology (graduate school). He was also elected de Facto Diplomate of Neurology at the Asian College of Veterinary Internal Medicine. His research interests are canine and feline epileptology and epilepsy surgery consistently.