Gastroenterological Medicine

What we do

At our department, our primary focus is the surgical management of a broad range of gastroenterological diseases.

At the outpatient clinic, we perform initial evaluations not only for surgical gastrointestinal conditions referred from other medical institutions, but also for patients presenting with hernias and anorectal disorders. Furthermore, we provide routine post-operative follow-up examinations and adjuvant chemotherapy for patients who have undergone cancer surgery.

In close collaboration with emergency medicine physicians at the Emergency & Trauma Center, our team is also responsible for the rapid diagnosis and surgical treatment of acute abdominal conditions.

Conditions we handle

We deliver comprehensive surgical care and post-operative management for the following conditions:

Gastrointestinal & Hepatobiliary-Pancreatic Malignancies: Esophageal Cancer, Gastric (Stomach) Cancer, Gastrointestinal Stromal Tumors (GIST), Colon Cancer, Rectal Cancer, Pancreatic Cancer, Liver Cancer, and Biliary Tract Cancer.

Benign Abdominal & Hepatobiliary Conditions: Cholelithiasis (Gallstones), Appendicitis, and Intestinal Obstruction (Ileus).

Hernias: Inguinal Hernia, Femoral Hernia, and Ventral/Incisional Hernia.

Anorectal Disorders: Internal Hemorrhoids, Anal Fistula, and Rectal Prolapse.

Number of cases

Outpatient visits: 13,626 patients
Inpatient admissions: 21,990 patients
(FY2024 results)

Operation results

Name of examination & medical treatment (2008)	Subtotal	Breakout
Name of examination & medical treatment (2008)	Subtotal	Hospital	Clinic	Dock

Upper gastrointestinal endoscope	15,266	2,844	7,843	4,579
Upper gastrointestinal endoscopic hemostasis	225	225
Esophageal variceal sclerotherapy	73	73
Upper gastrointestinal excision of a polyp & early cancer	162	162
Gastrostomy	117	117
Other	131	131

Colonoscopy	8,804	1,214	4,844	2,746
Large intestine endoscopic hemostasis	59	59
Colonic polypectomy	1,073	1,073
Other	52	52

Pancreaticobiliary; ERCP / Quarrying / drainage procedure, etc…	435	435
Endoscopic sphincterotomy（EST）	213	213
Other	31	31

Endoscopic ultrasonography	658	520	138

Bronchoscopy	429	429
Total	27,728	7,578	12,825	7,325

List of Doctors

Advisor (Part-time)

Hiroyuki MAGUCHI

Subspeciality
Imaging diagnosis of pancreatic and biliary diseases; endoscopic diagnosis and treatment

Department name	Gastroenterological Medicine
Medical School	Teikyo University
Education & Career	Mar 1983 – Graduated from Teikyo University May 1983 – Third Department of Internal Medicine, Asahikawa Medical University Apr 1985 – Department of Gastroenterology, Asahikawa Kosei Hospital Jun 1990 – Staff Physician, Third Department of Internal Medicine, Asahikawa Medical University May 1995 – Chief of Gastroenterology, Sapporo Kosei Hospital Apr 1997 – Director, Gastroenterology Center, Teine Keijinkai Hospital Apr 2018 – Appointed Advisor (Part-time), Department of Gastroenterology, current hospital

Chief of Gastroenterology

So NAKAJI

Subspeciality
Biliary pancreatic treatment endoscope

Department name	Gastroenterological Medicine
Medical School	Saga Medical University Faculty of Medicine
Special Qualifications	Board Certified Specialist and Advanced Certified Speialist of The Japanese Society of Gastroenterology Board Certified Specialist and Advanced Certified Speialist of The Japan Gastroenterological Endoscopy Society Board Certified Specialist and Advanced Certified Speialist of The Japanese Society of Internal Medicine Board Certified Specialist and Advanced Certified Speialist of The Japanese Gastroenterological Association Board Advanced Certified Speialist of The Japan Biliary Association
Education & Career	2002 Mar. Graduated from Saga Medical University Faculty of Medicine 2002 Apr. Kenwakai Otemachi Hospital 2005 Jul. Chidoribashi Hospital 2006 Apr. Senior Resident in Gastroenterology，Kameda Medical Center 2008 Nov. Gastroenterology， Kameda Medical Center 2009 Dec. Assistant Chief of Gastroenterology， Kameda Medical Center 2012 Apr. Vice Chief of Gastroenterology， Kameda Medical Center 2017 Apr. Chief of Gastroenterology， Kameda Medical Center

Vice Chief of Gastroenterology

Kenichiro NAKACHI

Subspeciality
Endoscopic treatment

Department name	Gastroenterological Medicine
Medical School	Wakayama Medical University School of Medicine
Special Qualifications	Board Certified Specialist and Advanced Certified Speialist of Japan Gastroenterological Endoscopy Society Board Certified Specialist of The Japanese Society of Gastroenterology Board Certified Physician of The Japanese Society of Internal Medicine
Education & Career	2005 Mar. Graduated from Wakayama Medical University School of Medicine 2007 Apr. University Assistant Professor， Department of Medicine， Wakayama Medical University Hospital 2008 Apr. Gastroenterology inTokyo Teishin Hospital 2010 Apr. University Assistant Professor， Second Internal Medicine， Wakayama Medical University Hospital 2016 Apr. Deputy Assistant Chief of Gastroenterology，Hashimoto Municipal Hospital 2016 Dec. Chief of Gastroenterology，Hashimoto Municipal Hospital 2017 Apr. Assistant Chief of Gastroenterology，Hashimoto Municipal Hospital 2019 Apr. Vice Chief of Gastroenterology，Kameda Medical Center

Vice Chief of Gastroenterology

Toshiyasu SHIRATORI

Department name	Gastroenterological Medicine
Medical School	Nihon University School of Medicine
Special Qualifications	Board Certified Specialist of The Japanese Society of Gastroenterology Board Certified Specialist and Advanced Certified Speialist of Japan Gastroenterological Endoscopy Society Board Certified Specialist of The Japanese Society of Internal Medicine
Education & Career	2007 Mar. Graduated from Nihon University School of Medicine 2007 Apr. junior resident in After Graduated Training Center，Kameda Medical Center 2009 Apr. Senior Resident in Gastroenterology，Kameda Medical Center 2010 Apr. Dispatched to Awa Regional Medical Center 2013 Apr.Gastroenterology in Kameda Medical Center 2015 Nov. Assistant Chief of Gastroenterology， Kameda Medical Center 2018 Apr. Vice Chief of Gastroenterology， Kameda Medical Center

Chief Physician, Gastroenterology Department

Tomoyuki FUNATO

Subspeciality
General Medicine, Infectious Diseases, Emergency Medicine, Gastrointestinal Diseases

Department name	Gastroenterological Medicine
Medical School	Saitama Medical University
Special Qualifications	Board-Certified Internal Medicine Specialist (Japanese Society of Internal Medicine) Board-Certified Internal Medicine Specialist (Japanese Board of Medical Specialties) Board-Certified Gastroenterology Specialist (Japanese Society of Gastroenterology) Board-Certified Endoscopy Specialist (Japanese Society of Gastrointestinal Endoscopy)
Education & Career	Mar 2016 – Graduated from Saitama Medical University Apr 2016 – Initial Clinical Resident, Saitama Medical University Hospital Apr 2018 – Resident, Internal Medicine (General Internal Medicine), Current Hospital Apr 2021 – Staff Physician, Gastroenterology Department Jan 2025 – Chief Physician, Gastroenterology Department

Chief Physician of Gastroenterology Department

Takuro NISHIWAKI

Subspeciality
Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Fujita Health University
Special Qualifications	Board-Certified Internal Medicine Specialist (Japanese Board of Medical Specialties) Board-Certified Endoscopy Specialist (Japanese Society of Gastrointestinal Endoscopy) Board-Certified Gastroenterology Specialist (Japanese Society of Gastroenterology) Board-Certified Ultrasound Specialist (Japanese Society of Ultrasound Medicine) Board-Certified Hepatology Specialist (Japanese Society of Hepatology) Completed JMECC (Japanese Medical Emergency Critical Care) Certification ICLS (International Course in Life Support) Certification (Japanese Society of Emergency Medicine) FCCS Provider (Society of Critical Care Medicine) Completed Ministry of Health Online Medical Consultation Training
Education & Career	Mar 2016 – Graduated from Fujita Health University Apr 2016 – Initial Clinical Resident, Mie University Hospital Apr 2018 – Resident, Internal Medicine, Current Hospital Apr 2021 – Staff Physician, Gastroenterology Department Jan 2025 – Chief Physician, Gastroenterology Department

Staff Physician, Gastroenterology Department

Natsuki KAWAMITSU

Subspeciality
Gastroenterology

Department name	Gastroenterological Medicine
Medical School	University of the Ryukyus
Special Qualifications	Board-Certified Physician (Japanese Society of Internal Medicine) Board-Certified Gastroenterology Specialist (Japanese Society of Gastroenterology) Board-Certified Endoscopy Specialist (Japanese Society of Gastrointestinal Endoscopy) Completed Ministry of Health Online Medical Consultation Training
Education & Career	Mar 2011 – Graduated from University of the Ryukyus Apr 2011 – Initial Clinical Resident, Chubu Tokushukai Hospital Apr 2013 – General Medicine Department Apr 2016 – Advanced Resident, Gastroenterology Department, Current Hospital Apr 2018 – Staff Physician, Gastroenterology Department

Takashi ASHIKAWA

Subspeciality
Internal Medicine, Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Tokyo Medical University
Education & Career	Mar 2018 – Graduated from Tokyo Medical University Apr 2018 – Initial Clinical Resident, Tokyo Shinagawa Hospital Apr 2020 – Gastroenterology Resident, Current Hospital Apr 2024 – Staff Physician, Department of Gastroenterology

Staff Physician (Medical Doctor)

Kiho SHINAGAWA

Subspeciality
Gastrointestinal Endoscopy

Department name	Gastroenterological Medicine
Medical School	Shinshu University
Education & Career	Mar 2019 – Graduated from Shinshu University School of Medicine Apr 2019 – Hiratsuka City Hospital Apr 2021 – Yokohama Sakae Kyosai Hospital Apr 2023 – International University of Health and Welfare Atami Hospital Apr 2025 – Department of Gastroenterology, Current Hospital

Staff Physician (Medical Doctor)

Yuri ISAKA

Subspeciality
Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Yamaguchi University
Education & Career	Mar 2021 – Graduated from Yamaguchi University School of Medicine Apr 2021 – Tokyo Bay Urayasu-Ichikawa Medical Center Apr 2023 – Tokyo Metropolitan Tama Medical Center Apr 2024 – Gastroenterology Resident, Kameda Medical Center Apr 2025 – Gastroenterology Resident, Tokyo Metropolitan Tama Medical Center Apr 2026 – Staff Physician, Department of Gastroenterology, Kameda Medical Center

Staff Physician (Medical Doctor)

Hikaru FUJIMOTO

Subspeciality
Hepato-Biliary-Pancreatic Diseases

Department name	Gastroenterological Medicine
Medical School	Saga University
Education & Career	Mar 2020 – Graduated from Saga University School of Medicine Apr 2020 – Initial Clinical Resident, Saga Prefectural Medical Center Koseikan Apr 2021 – Initial Clinical Resident, Saga University Hospital Apr 2022 – Hepato-Biliary-Pancreatic Medicine, Saga Prefectural Medical Center Koseikan Apr 2023 – Hepato-Biliary-Pancreatic Medicine, Saga University Hospital Mar 2025 – Hepato-Biliary-Pancreatic Medicine, Saga Prefectural Medical Center Koseikan Apr 2026 – Staff Physician, Department of Gastroenterology, Kameda Medical Center

Internal Medicine Resident (Gastroenterology Training)

Taichi SUMI

Subspeciality
Gastrointestinal Diseases, Endoscopic Treatment

Department name	Gastroenterological Medicine
Medical School	The University of Tokyo
Education & Career	Mar 2022 – Graduated from The University of Tokyo School of Medicine Apr 2022 – Takeda General Hospital Apr 2024 – Tokyo Metropolitan Police Hospital Apr 2025 – Department of Gastroenterology, Current Hospital

Staff Physician (Medical Doctor)

Nobuaki OGAMI

Subspeciality
Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Kansai Medical University
Education & Career	Mar 2022 – Graduated from Kansai Medical University School of Medicine Apr 2022 – Kurume University Hospital Apr 2024 – Kurume University School of Medicine Apr 2025 – Department of Gastroenterology, Current Hospital

Internal Medicine Resident

Takero HANADA

Subspeciality
Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Juntendo University
Education & Career	Mar 2024 – Graduated from Juntendo University School of Medicine Apr 2024 – Initial Clinical Resident, Postgraduate Training Center, Current Hospital

Resident Physician (Specialist Training)

Tasuku SUZUKI

Subspeciality
Internal Medicine, Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Fukushima Medical University
Education & Career	Mar 2021 – Graduated from Fukushima Medical University School of Medicine Apr 2021 – Clinical Resident, Japanese Red Cross Fukushima Hospital Apr 2023 – Internal Medicine Resident, Mitsui Memorial Hospital Apr 2026 – Resident Physician, Department of Gastroenterology, Kameda Medical Center

Resident Physician (Specialist Training)

Hiroya KOIDE

Subspeciality
General Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Saga University
Education & Career	Mar 2023 – Graduated from Saga University School of Medicine Apr 2023 – Saga Prefectural Medical Center Koseikan (Local Independent Administrative Institution) Apr 2025 – Fukuoka University Hospital Apr 2026 – Resident Physician, Department of Gastroenterology, Kameda Medical Center

Resident Physician (Specialist Training)

Yuto OTAKI

Subspeciality
Upper and Lower Gastrointestinal Endoscopy

Department name	Gastroenterological Medicine
Medical School	Kindai University
Education & Career	Mar 2023 – Graduated from Kindai University School of Medicine Apr 2023 – Kyudai / Omuta City Hospital Training Course Apr 2025 – Department of Internal Medicine, Division of Gastroenterology, Kurume University School of Medicine Apr 2026 – Resident Physician, Department of Gastroenterology, Kameda Medical Center

Resident Physician (Specialist Training)

Ryo HASHIZUME

Subspeciality
Gastrointestinal Tract

Department name	Gastroenterological Medicine
Medical School	Showa Medical University
Education & Career	Mar 2021 – Graduated from Showa Medical University School of Medicine Apr 2022 – Initial Clinical Residency, Showa Medical University Hospital Apr 2024 – Joined Department of Gastroenterology, Showa Medical University Koto Toyosu Hospital Apr 2026 – Resident Physician, Department of Gastroenterology, Kameda Medical Center

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Yuhei HAO

Subspeciality
Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Nihon University
Education & Career	Mar 2024 – Graduated from Nihon University School of Medicine Apr 2024 – Ageo Central General Hospital (Medical Corporation Aiyukai) Apr 2026 – Resident Physician, Department of Gastroenterology, Kameda Medical Center

President of Makuhari Clinic

Ryoichi WADA

Subspeciality
Upper and Lower Gastrointestinal Endoscopy, Endoscopic Diagnosis & Therapeutic Procedures, General Gastroenterology

Department name	Gastroenterological Medicine
Medical School	Hokkaido Unversity， School of Medicine
Special Qualifications	Board Certified Physician of Japanse Society of Internal Medicine
Education & Career	2006 June: President of Makuhari Clinic 2002: Chief of Gastroenterology， and Chief of Comprehensive Medical Check Up Center， Kameda Medical Center 2000: Chief of Gastroenterology， Kameda Medical Center 1999: Vice Chief of Gastroenterology， Kameda Medical Center 1995: Assistant Chief of Gastroenterology， Kameda Medical Center 1992: Gastroenterology， Kameda Medical Center 1987: Graduated from Hokkaido Unversity， School of Medicine Medical Emergenciy Center of Kyorin University Hospital National Cancer Center

Part-time Physician

Takahisa SATO

Subspeciality
Gastroenterology (Hepatology)

Department name	Gastroenterological Medicine
Medical School	Nagoya City University
Special Qualifications	Certified Internal Medicine Physician / General Internal Medicine Specialist (Japan) Gastroenterological Endoscopy Specialist (JGES) Gastroenterology Specialist (JSGE) Hepatology Specialist & Instructor (JSH) Certified Occupational Physician (Japan Medical Association) PhD (Medical Science)
Education & Career	Mar 2001 – Graduated from Nagoya City University School of Medicine Jun 2001 – Resident Physician, The University of Tokyo Hospital Jun 2002 – Resident Physician, National Hospital Organization Asahi General Hospital Jun 2003 – Staff Physician, Department of Gastroenterology, Asahi General Hospital Apr 2005 – Staff Physician, 2nd Department of Internal Medicine, The University of Tokyo / Enrolled in Graduate School of Medicine Mar 2009 – Completed Graduate School of Medicine, The University of Tokyo Apr 2009 – Staff Physician, Department of Gastroenterology, Kyoundo Hospital (Sasaki Institute) Dec 2012–Dec 2013 – Assistant Professor, Gastrointestinal Imaging & Therapy Lab, Juntendo University Hospital Apr 2015–Mar 2017 – Staff Physician, Kyoundo Hospital Apr 2017 – Lecturer, Department of Gastroenterology, Teikyo University Chiba Medical Center May 2014 – Part-time Physician, Department of Gastroenterology, Current Hospital