Physicians in Charge by Department

As of Apr. 2025

Director General

ISHIKAWA Hitoshi, Director

Background	1995:Gunma University, School of Medicine, Gunma 2002: Gunma University, Graduate School of Medicine, Gunma
Qualifications	MD;Board Certified Radiation Oncologist, Japan Radiological Society General Clinical Oncologist, Japanese Board of Cancer Therapy
Societies	Japan Radiological Society, Japanese Society for Radiation Oncology, Japan Society of Clinical Oncology, Japan Lung Cancer Society, Japan Esophageal Society, Japan Society of Urologic Oncology
Specialties	Prostate cancer, lung cancer, esophageal cancer

Deputy Director General

WAKATSUKI Masaru, Director

Background	2002:Gunma University, School of Medicine, Gunma 2007: Gunma University, Graduate School of Medicine, Gunma
Qualifications	MD; Board Certified Radiation Oncologist, Japan Radiological Society General Clinical Oncologist, Japanese Board of Cancer Therapy
Societies	Japan Radiological Society,Japanese Society for Radiation Oncology,Japan Society of Clinical Oncology,Japan Society of Gynecologic Oncology
Specialties	Radiation oncologyGynecological radiation therapyCarbon ion radiotherapy

Director of Treatment Diagnostics

SHINOTO Makoto, Director

Background	2003: Graduated from Kyushu University School of Medicine
Qualifications	MD; Board Certified Radiation Oncologist, Japan Radiological Society; General Clinical Oncologist, Japanese Board of Cancer Therapy; Senior Radiation Protection Supervisor
Societies	Japan Radiological Society, Japanese Society for Radiation Oncology, Japan Society of Clinical Oncology, Japan Pancreas Society, etc.
Specialties	Radiation oncology

Director of Medical Technology

KISHIMOTO Riwa, Director

Background	1988: Graduated from Hokkaido University School of Medicine 1992: Completed coursework at Hokkaido University Graduate School of Medicine
Qualifications	MD (Hokkaido University); Board Certified Diagnostic Radiologist, Japan Radiological Society; Board Certified Physician in PET Nuclear Medicine, Japanese Society of Nuclear Medicine
Societies	Japan Radiological Society, Japanese Society for Magnetic Resonance in Medicine, Japan Society of Ultrasonics in Medicine , Radiological Society of North America
Specialties	Diagnostic imaging with CT, MRI and ultrasound

Section Manager of International Medical Cooperation

IMAI Reiko, Section Manager

Background	Graduated from Gunma University Completed doctoral program at Gunma University Graduate School of Medicine
Qualifications	MD; Board Certified Radiation Oncologist, Japan Radiological Society; General Clinical Oncologist, Japanese Board of Cancer Therapy
Societies	Japan Radiological Society, Japanese Society for Radiation Oncology, Japan Society of Clinical Oncology, Japanese Orthopaedic Association, etc.
Specialties	Radiation oncology

Radiation Oncology Section

NAKAJIMA Mio, Section Manager

Background	2001: Graduated from Shinshu University School of Medicine 2001: Entered Department of Respiratory Surgery, Chiba University School of Medicine 2009: Completed doctoral program, Department of General Thoracic Surgery, Chiba University Graduate School of Medicine 2011: Current position
Qualifications	MD; Board Certified Radiologist, Japan Radiological Society; General Clinical Oncologist, Japanese Board of Cancer Therapy; Board Certified Bronchoscopy Specialist and Bronchoscopy Advisor, Japan Society for Respiratory Endoscopy
Societies	Japanese Society for Radiation Oncology, Japan Radiological Society, Japan Lung Cancer Society, Japan Society for Respiratory Endoscopy, Japanese Society of Clinical Cytology
Specialties	Carbon ion radiotherapy for lung cancer, radiation oncology

KOBAYASHI Kana, Section Manager

Background	2000: Graduated from Kyoto Prefectural University of Medicine 2006: Completed doctoral program at Kyoto Prefectural University of Medicine
Qualifications	MD; Board Certified Radiologist , Japan Radiological Society; Board Certified Radiation Oncologist, Japan Radiological Society
Societies	Japan Radiological Society, Japanese Society for Radiation Oncology, etc.
Specialties	Radiation oncology, Prostate cancer, Breast cancer

MURATA Kazutoshi, Section Manager

Background	2006: Graduated from Gunma University Faculty of Medicine 2014: Completed doctoral program at Gunma University Graduate School of Medicine
Qualifications	MD; Board Certified Radiologist , Japan Radiological Society; Board Certified Radiation Oncologist, Japan Radiological Society; General Clinical Oncologist, Japanese Board of Cancer Therapy
Societies	Japan Radiological Society, Japanese Society for Radiation Oncology, Japan Society of Clinical Oncology, Japan Society of Gynecologic Oncology, etc.
Specialties	Radiation oncology, gynecological radiation therapy (external beam therapy, brachytherapy), carbon ion radiotherapy

IKAWA Hiroaki, Dentist (Chief Dentist)

Background	2007: Tokyo Dental College 2008: Department of Oral Medicine, Oral and Maxillofacial Surgery, Tokyo Dental College 2012: Current position
Qualifications	D.D.S., Ph.D.,Qualified Oral Radiation Oncologist, Japanese Society for Oral and Maxillofacial Radiology; Associate Specialist, the Japanese Society of Oral and Maxillofacial Surgeons
Societies	Japanese Society for Radiation Oncology, Japanese Society for Oral and Maxillofacial Radiology, Japanese Society of Oral and Maxillofacial Surgeons
Specialties	Radiation oncology, Carbon ion radiotherapy (oral cancer), Oral Medicine, Oral and Maxillofacial Surgery

TAKIYAMA Hirotoshi, Chief physician

Background	2008: The University of Tokyo Faculty of Medicine 2008: The University of Tokyo Hospital 2010: Department of Surgery, Tokyo Metropolitan Police Hospital 2013: Department of Colon and Rectal Surgery, The University of Tokyo Hospital 2014: Entered Department of Surgical Oncology (formerly First Department of Surgery), The University of Tokyo 2018: Completed doctoral program at Graduate School of Medicine, The University of Tokyo 2018: Current position
Qualifications	MD; Board Certified Surgeon, Japan Surgical Society; Board Certified Gastroenterological Endoscopy Specialist, Japan Gastroenterological Endoscopy Society
Societies	Japan Surgical Society, Japanese Society of Gastroenterological Surgery, Japan Gastroenterological Endoscopy Society, Japan Society for Endoscopic Surgery, Japan Society of Coloproctology, Japan Society of Clinical Oncology, Japanese Society for Radiation Oncology
Specialties	Gastrointestinal surgery, oncological radiology

MAKISHIMA Hirokazu, Chief physician

Background	2009: Graduated from Yokohama City University
Qualifications	MD;
Societies	Japan Society of Oncology
Specialties	Oncological radiology

ISOZAKI Tetsuro, Chief physician

Background	2009: Graduated from Chiba University, School of Medicine 2016: Completed doctoral program at Chiba University Graduate School of Medicine 2022: Current position
Qualifications	MD; Board Certified Surgeon, Japan Surgical Society; Board Certified Surgeon in Gastroenterology, The Japanese Society of Gastroenterological Surgery; Endoscopic surgical skill qualification system: qualified surgeon, Japan Society for Endoscopic Surgery; Board Certified Esophagologist, The Japan Esophageal Society; General Clinical Oncologist (by JBCT)
Societies	Japan Surgical Society, The Japanese Society of Gastroenterological Surgery, Japan Society for Endoscopic Surgery, The Japan Esophageal Society, Japan Society of Oncology
Specialties	Gastrointestinal surgery, Oncological radiology

OKATO Atsushi, Chief physician

Background	2009: Graduated from Chiba University, School of Medicine
Qualifications	MD;
Societies	Specialist of the Japanese Urological Association
Specialties	Urological tumors

YAMADA Shigeru, physician

Background	1986: Second Department of Surgery, Chiba University 1992: Department of Esophageal-Gastro-Intestinal Surgery, Chiba Cancer Center 1996: NASA Johnson Space Center (postdoctoral fellowship), United States 1998: National Institute of Radiological Sciences Hospital
Qualifications	MD; Board Certified Radiation Oncologist, Japan Radiological Society; Board Certified Physician , Japan Surgical Society; Board Certified Physician, Japanese Society of Gastroenterological Surgery
Societies	Japan Surgical Society, Japanese Society of Gastroenterological Surgery, Japan Radiological Society, Japanese Society for Radiation Oncology, Japan Society of Clinical Oncology, Japan Society of Coloproctology, Japan Pancreas Society, Japan Esophageal Society
Specialties	Radiation therapy (gastrointestinal), gastrointestinal surgery, radiobiology, space radiation exposure

MIURA Kosei, physician

Background	2012: Graduated from Tsukuba University School of Medicine
Qualifications	MD; Board Certified Radiologist, Japan Radiological Society; Board Certified Radiation Oncologist, Japan Radiological Society
Societies
Specialties	Radiation oncology

KUROSAKI Hiroki, physician

Background	Graduated from Chiba University School of Medicine
Qualifications
Societies
Specialties

KOBAYASHI Nao, physician

Background	Graduated from Gunma University School of Medicine
Qualifications	MD; Board Certified Radiologist, Japanese Medical Specialty Board; Board Certified Radiation Oncologist, Japan Radiological Society; Senior Radiation Protection Supervisor
Societies	Japan Radiological Society, Japanese Society for Radiation Oncology, Japan Society of Clinical Oncology
Specialties	Radiation oncology

KARITA Ryo, physician

Background	Graduated from Chiba University School of Medicine
Qualifications
Societies
Specialties	Pulmonary Oncology

TAMAGUCHI Tomoki, physician

Background	Graduated from Kyoto Prefectural University of Medicine School of Medicine
Qualifications
Societies
Specialties	Radiation oncology

SHIDA Nana,Dentist

Background	2023: Tokyo Dental College School of Medicine
Qualifications
Societies
Specialties	Oral and Maxillofacial Radiology

KARASAWA Kumiko, Part-Time physician

Background	1986: Graduated from Tokyo Women’s Medical University 2015-: Present Professor and Chair, Department of Radiation Oncology, Tokyo Women's Medical University
Qualifications	Japanese Board of Radiology in Therapeutic Radiology, Japanese Board of Radiation Oncology, The Japanese Breast Cancer Society Breast Cancer Specialist, The Japanese Board of Cancer Therapy
Societies	Japan Radiological Society, Japanese Society for Radiation Oncology, Japan Society of Clinical Oncology, Japan Society of Medical Physics, Japan Radiation Oncology Study Group, The Japanese Breast Cancer Society ,American Society for Radiation Oncology
Specialties	Breast Cancer

Diagnostic Radiology Section

OMATSU Tokuhiko, Section manager

Background	1998: Graduated from Hokkaido University School of Medicine 1998: Staff, Hokkaido University School of Medicine 2009: Current position
Qualifications	Board Certified Radiologist, Japan Radiological Society; Board Certified Physician in Reading Screening Mammograms, Central Committee for Quality of Mammography Screening
Societies	Japan Radiological Society, Japanese Society of Interventional Radiology
Specialties	Diagnostic imaging with CT and MRI

Department of Radiology

TACHIBANA Yasuhiko, physician

Background	2005: Graduated from Tohoku University School of Medicine 2015: Completed doctoral program at Yokohama City University Graduate School of Medicine 2015: Current position
Qualifications	MD; Board Certified Diagnostic Radiologist, Japan Radiological Society; Board Certified Physician in PET Nuclear Medicine, Japanese Society of Nuclear Medicine; Board Certified Physician in Reading Screening Mammograms, Central Committee for Quality of Mammography Screening
Societies	Japan Radiological Society, Japanese Society for Magnetic Resonance in Medicine, Japanese Association for Medical Artificial Intelligence, International Society for Magnetic Resonance in Medicine
Specialties	Diagnostic radiology, machine learning/artificial intelligence

Department of Moleculor Imaging and Theranostics

HIGASHI Tatsuya, Director

Background	1989 Graduated from Kyoto University Faculty of Medicine 1998: Completed doctoral program at Kyoto University Graduate School of Medicine 1998: Research fellow, Division of Nuclear Medicine, University of Michigan (United States) 2000: Staff, Kyoto University Hospital 2007: Research staff, Shiga Medical Center for Adults Research Institute 2016: Current position
Qualifications	MD; Board Certified Nuclear Medicine Specialist, Japanese Society of Nuclear Medicine; Board Certified Physician in PET Nuclear Medicine, Japanese Society of Nuclear Medicine; Board Certified Radiologist, Japan Radiological Society; Board Certified Internist, Japanese Society of Internal Medicine; Board Certified Gastroenterologist, Japanese Society of Gastroenterology; Board Certified Gastroenterological Endoscopy Specialist, Japan Gastroenterological Endoscopy Society
Societies	Japanese Society of Nuclear Medicine, Japanese Society of Internal Medicine, Japan Radiological Society, Japanese Society for Molecular Imaging, Japan Association of Endocrine Surgery, Japan Association of Endocrine Surgery, Japan Thyroid Association, Japanese Society of Gastroenterology, Japan Society of Clinical Oncology
Specialties	Diagnosis and treatment in oncological nuclear medicine

OBATA Takayuki, Deputy Director

Background	1991: Graduated from Yokohama City University School of Medicine 1996: Completed doctoral program at Yokohama City University Graduate School of Medicine 1996: National Institute of Radiological Sciences 1999: Department of Radiology, University of California San Diego 2016 to present: Deputy Director, Department of Molecular Imaging and Theranostics Team Leader, Applied MRI Research Team Visiting Professor, Chiba University, Tokyo Metropolitan University, and Yokohama City University http://www.nirs.qst.go.jp/amr_diag/
Qualifications	MD; Board Certified Diagnostic Radiologist , Japan Radiological Society; Board Certified Physician in PET Nuclear Medicine, Japanese Society of Nuclear Medicine
Societies	Japan Radiological Society, Japanese Society for Magnetic Resonance in Medicine, Japanese Society of Nuclear Medicine
Specialties	MRI in medicine, radiology

TAKAHASHI Miwako, Group Leader

Background	Graduate School of Medicine of the University of Tokyo, Radiology and Biomedical Engineering, Nuclear medicine, completed in 2008
Qualifications	Board Certified Nuclear medicine physician
Societies	Japanese society of nuclear medicine
Specialties	Nuclear Medicine, Positron Emission Tomography

Clinical Research Section

Fugo Kazunori, Section Manager

Certificate of Passport for Good Clinical Practice, Japanese Society of Clinical Trials and Research JSBi (Japanese Society for Bioinformatics) Certified Bioinformatics Engineer; Japanese Society of Clinical Trials and Research; Japanese Society for Bioinformatics;

Background	1996: Graduated from Hokkaido University School of Medicine 2001: Completed doctoral program at Hokkaido University Graduate School of Medicine
Qualifications	MD; Board Certified Pathologist, The Japanese Society of Pathology; Certified Molecular Pathologist, The Japanese Society of Pathology; Certified Cytology Specialist, Japanese Society of Clinical Cytology; Qualified Clinical Laboratory Managing Physician, Japanese Society of Laboratory Medicine;
Societies	The Japanese Society of Pathology; Japanese Society of Clinical Cytology; Japanese Society of Laboratory Medicine;
Specialties	Pathology