On March 11, 2026, a retirement lecture was held at the Matsumae Memorial Hall for Professor Mari Oda of Hachioji Hospital, who dedicated 39 years to the treatment of cerebrovascular disorders and the training of surgeons in the field of Neurosurgery.

He has led Neurosurgery at Tokai University for 39 years. We express our deepest gratitude for his many years of dedication.

After retirement, he is scheduled to continue working in Neurosurgery at Tokyo Tenshi Hospital.