Membership: World Federation of Neurosurgery (Committee of neuroendoscopy section) International Federation for Neuroendoscopy (EB, Treasurer) International Hands-on Workshop on Cerebral and Ventricular Neuroendoscopy (Faculty) International Society for Hydrocephalus and Cerebrospinal Fluid Disorders (Member) International Hydrocephalus Imaging Working Group (Member) International Society for Pediatric Neurosurgery (Active membership) Japan Neurosurgical Society (Certificated board member) Japanese Society for Neuroendoscopy (Certificated board member) Japanese Society for Hydrocephalus and CSF disorders (Executive committee, President of 7th annual meeting) Japanese Society for Pediatric Neurosurgery (Executive committee) European Association of Neurosurgery (Individual membership) European Society for Pediatric Neurosurgery (Active membership) Asian- Australasian Society for Pediatric Neurosurgery (membership)

Pediatric neurosurgery, Neuroendoscopic surgery, Hydrocephalus and CSF physiology, Neuropathology