After having graduated from Tokyo University,Dr. Kitahara trained at Tokyo University Medical School Hospital. In 1995, He started „Kitahara International Hospital“ in Hachioji, Tokyo. As of now, He managed 5 hospitals in Japan to offer consistent healthcare service from critical care to home care. Also, He is engaged in „Healthcare and Human Resource Development Project“ in Cambodia which aims to construct Phnom Penh‘s first international-standard critical care center and train Cambodia‘s medical staff. In 2016, He is going to hold the first international congress of Neurosurgery in Cambodia: Joint Neurosurgical Convention