Neurosurgery

What we do

The Department of Neurosurgery at Kameda Medical Center provides advanced, minimally invasive surgical care tailored to each patient's unique condition. Servicing as the tertiary neurosurgical care hub for the southern Boso Peninsula and the wider Kanto region, we deliver specialized medical care ranging from complex skull base surgeries to round-the-clock emergency neurotrauma management.

Key Clinical Strengths & Highlights

1. Advanced Skull Base Surgery & Malignant Brain Tumor Care

We specialize in high-difficulty skull base surgeries and malignant brain tumors, utilizing state-of-the-art, minimally invasive techniques designed to maximize tumor resection while minimizing surgical trauma and physical burden.

International Academic Recognition: Dr. Kyoichi Higashimoto was awarded the prestigious 2025 Travel Scholarship by the North American Skull Base Society (NASBS)

2. Comprehensive 24/7/365 Emergency Care for the Boso Peninsula

As the core regional center, our department collaborates closely with Emergency Medicine, Neurology, Diagnostic Radiology, and Surgical Operations to accept all neurosurgical emergencies in the southern Boso Peninsula.

Round-the-Clock Diagnostic & Surgical Readiness: Advanced imaging (CT, MRI, Angiography) and experienced board-certified neurosurgeons are available 24/7/365 for urgent interventions, such as cerebral aneurysm clipping
Air Ambulance / Helicopter Transport: Equipped with helipad facilities, we seamlessly accept emergency transfers from the northern Boso Peninsula and throughout the greater Kanto area

Conditions we handle

Brain tumors:
Meningiomas, Schwannomas (Acoustic Neuromas), Gliomas, Pituitary Adenomas, Craniopharyngiomas, Germ Cell Tumors, Metastatic Brain Tumors, and other intracranial neoplasms.

Cerebrovascular disease:
Ruptured (Subarachnoid Hemorrhage - SAH) and Unruptured Cerebral Aneurysms, Arteriovenous Malformations (AVM), Dural Arteriovenous Fistulas (dAVF), Intracerebral Hemorrhage, Cerebral Infarction (Stroke), Moyamoya Disease, and Carotid Artery Stenosis.

Head injury:
Acute Epidural Hematoma, Acute Subdural Hematoma, Cerebral Contusion, Chronic Subdural Hematoma, and Skull Fractures.

Functional brain disease:
Hemi-facial cramps, trigeminal neuralgia

Other brain surgery diseases:
Hydrocephalus, part of congenital malformations in children

Operation results

	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008
Total Number of Operations	252	296	284	316	298	369	304	370	361	372	357	269

Cerebral aneurysm Clipping (Total)	65	78	54	83	48	75	57	68	48	58	42	50
Ruptured	44	66	41	70	34	56	43	57	38	50	24	30
Unruptured	21	12	12	13	14	19	14	11	10	8	18	20
Brain Tumor removal ( Total)	26	18	29	18	27	24	16	21	20	23	37	26
Glioma	10	2	4	3	6	5	5	8	1	2	8	4
Acoustic schwannoma	0	2	2	2	5	4	0	0	1	2	2	1
Meningioma	5	6	12	5	10	8	8	8	11	15	10	8
Pituitary adenoma	4	5	3	2	2	7	4	2	8	3	3	3

Intracerebral Hematoma	25	49	41	22	36	36	23	29	22	16	10	6
Cerebral Arteriovenous Malformationn	3	0	5	3	1	3	2	1	2	2	0	0
Microvascular decompression	5	2	2	4	2	5	1	3	1	5	6	5
Carotid Endarterectomy	5	1	6	11	4	5	1	8	0	0	0	0
Bypass surgery	8	3	5	7	4	4	6	3	3	0	0	3
Shunt surgery	25	25	24	23	30	27	29	35	42	35	17	14
Chronic Subdural hematoma Drainage procedure	52	39	47	63	62	59	60	80	93	69	70	73
Head Injury ( Craniotomy)	10	13	7	7	25	25	23	17	14	16	6	6

Endovascular treatment（Total）									53	65	61	64
Cerebral aneurysm Coil Embolization									19	23	22	14
Cerebral Arteriovenous Malformation Embolization									6	15	9	9
Carotid artery Stenting									5	15	11	32
Other ( including Tumor Embolization)										12	19	9

List of Doctors

Director of Neuroendovascular Surgery

Michihiro TANAKA

Subspeciality
Stroke surgery, Neuroendovascular surgery, Functional brain anatomy, Cerebral circulation & metabolism, Cerebral aneurysms, Carotid stenting, AVM, Dural arteriovenous fistula, Spinal vascular malformations, Maxillofacial vascular malformations

Department name	Neurosurgery
Medical School	Yamanashi University School of Medicine
Special Qualifications	Board Certified Specialist of Japan Neurosurgical Society Board Certified Specialist and Advanced Certified Specialist of The Japanese Society for Neuroendovascular Therapy
Education & Career	1991. Graduated from Yamanashi University School of Medicine 1991. Residency in Yokohama City University 1993. Neurosurgery， Yokohama City University 1994. Resident of Neurosurgery， National Cardiovascular Center 1996. Neurosurgery， Odawara City Hospital 1998. Neurosurgery， Yokohama City University 1998. Fellow of Neuroradiology， University of Zurich， Switzerland 1999. Assistant， University of Zurich， School of Medicine 2003. Lecturer， University of Zurich， School of Medicine Assistant Chief of Institute of Neuroendovascular Therapy 2004. Chief of Neurosurgery， Radiology， Kameda Medical Center 2005. Director of Neuroendovascular Surgery， Kameda Medical Center 2020. Chief Director, Neuroendovascular Therapy Department 2022. Chief Director, Departments of Neurosurgery & Neuroendovascular Therapy 2023. Chief Director, Kameda Brain and Spine Center (Current)

Director

Yoshinori SAKATA

Subspeciality
bypass surgery

Department name	Neurosurgery
Medical School	Kanazawa University School of Medicine
Special Qualifications	Registerd Doctor of the Japan neurosurgical Society， Fellow of the Japan Stroke Society， Fellow of the Japanese Society on Surgery for Cerebral Stroke， Fellow of the The Japanese Congress on Neurological Surgeons
Education & Career	Mar 1997 – Graduated from Kanazawa University School of Medicine Apr 1997 – Department of Neurosurgery, Chiba University Apr 1998 – Kimitsu Central Hospital Apr 1999 – National Chiba Hospital Oct 1999 – Chiba Cardiovascular Center Apr 2000 – Narita Red Cross Hospital Apr 2001 – Chiba Cardiovascular Center Apr 2002 – Chiba University Hospital Apr 2003 – Joined Neurosurgery, Kameda Medical Center Apr 2004 – Chief Physician, Neurosurgery Sep 2013 – Deputy Director, Neurosurgery Apr 2018 – Director, Neurosurgery Nov 2023 – Director, Neurosurgery, Kameda Brain and Spine Center

Deputy Director

Nobuyuki WATANABE

Subspeciality
Brain tumors, skull base tumors, endoscopic endonasal surgery, malignant brain tumors, trigeminal neuralgia, hemifacial spasm, glossopharyngeal neuralgia, hydrocephalus

Department name	Neurosurgery
Medical School	Jikei University School of Medicine
Special Qualifications	PhD (Medical Science) Board-Certified Neurosurgeon & Instructor (Japan Neurosurgical Society) Certified Neuroendoscopy Specialist (Japan Society for Neuroendoscopy) Clinical Training Instructor
Education & Career	Mar 2011 – Graduated from Jikei University School of Medicine Apr 2011 – Junior Resident, Jikei University Kashiwa Hospital Apr 2013 – Department of Neurosurgery, Jikei University Katsushika Medical Center Oct 2013 – Department of Neurosurgery, Jikei University Hospital Oct 2014 – Department of Neurosurgery, Jikei University Third Hospital Oct 2015 – Neurosurgery, National Hospital Organization Yokohama Medical Center Oct 2017 – Neurosurgery, Jikei University Third Hospital Apr 2022 – Appointed Deputy Director, Neurosurgery, Kameda Medical Center Nov 2023 – Deputy Director, Neurosurgery, Kameda Brain and Spine Center Apr 2024 – Research Fellow, Hôpital Lariboisière, Paris, France Nov 2024 – Clinical Fellow, Hôpital Lariboisière, Paris, France Jan 2026 – Jikei University Hospital Mar 2026 – Lecturer, Department of Neurosurgery, Jikei University Jun 2026 – Appointed Deputy Director, Neurosurgery, Kameda Brain and Spine Center

Staff Physician

Kyoichi TOMOTO

Subspeciality
Skull base surgery, multidisciplinary treatment of malignant brain tumors, microvascular decompression surgery

Department name	Neurosurgery
Medical School	Jikei University School of Medicine
Special Qualifications	Board-Certified Neurosurgeon (Japan Neurosurgical Society / JPB) Certified Neuroendoscopy Specialist (Japan Society for Neuroendoscopy) Certified Cancer Treatment Specialist (Japan Cancer Treatment Organization) Completed Palliative Care Training
Education & Career	Mar 2017 – Graduated from Jikei University School of Medicine Apr 2017 – Junior Resident, Jikei University Kashiwa Hospital Apr 2019 – Department of Neurosurgery, Seirei Hamamatsu Hospital Apr 2021 – Neurosurgery, Jikei University Kashiwa Hospital Apr 2022 – Neurosurgery, Jikei University Hospital Oct 2022 – Neurosurgery, Jikei University Kashiwa Hospital Apr 2024 – Joined Neurosurgery, Kameda Brain and Spine Center as Staff Physician

Resident Physician (Neurosurgery)

Yumi MATSUZAWA

Department name	Neurosurgery
Medical School	Showa University School of Medicine
Education & Career	Mar 2022 – Graduated from Showa University School of Medicine Apr 2022 – Kameda Medical Center Hospital Apr 2024 – Jikei University Hospital Oct 2024 – Jikei University Kashiwa Hospital Oct 2025 – Neurosurgery, Kameda Brain and Spine Center

Resident Physician (Neurosurgery)

Yukihiko KOBITSU

Subspeciality
Cerebrovascular diseases, brain tumors

Department name	Neurosurgery
Medical School	University of Toyama School of Medicine
Education & Career	Mar 2024 – Graduated from University of Toyama School of Medicine Apr 2024 – Jichi Medical University Hospital Apr 2026 – Appointed Resident Physician, Neurosurgery, Kameda Brain and Spine Center

Resident Physician (Neurosurgery)

Shiori YOSHINO

Subspeciality
Head trauma, cerebrovascular diseases, brain tumors, spine & spinal cord

Department name	Neurosurgery
Medical School	Jikei University School of Medicine
Education & Career	Mar 2023 – Graduated from Jikei University School of Medicine Apr 2023 – Jikei University Kashiwa Hospital Apr 2025 – Jikei University Katsushika Medical Center Apr 2026 – Appointed Resident Physician, Neurosurgery, Kameda Medical Center