Gynecology

What we do

The Department of Gynecology provides advanced, comprehensive, and specialized medical and surgical care across all spectrums of women’s health, from benign gynecological conditions to complex gynecological malignancies.

Key Strengths & Patient-Centered Care

Pioneering Laparoscopic Expertise (Benign Disease): We are a regional leader in Chiba Prefecture for minimally invasive laparoscopic surgeries (uterine fibroids, ovarian cysts, etc.). We prioritize safety, cosmetic outcomes (minimal scarring), and reduced post-operative complications.

Comprehensive Integrated Cancer Care: As a designated Cancer Care Hospital, we offer complete in-house oncological care—including surgery, radiation therapy, chemotherapy, and Cancer Genomic Medicine in collaboration with Medical Oncology.

Convenient Outpatient Options (OPEN Clinic): Patients visiting Kameda Clinic (Kamogawa) who face booking difficulties can access our Walk-in OPEN Outpatient Clinic (no prior appointment needed; registration required before 10:30 AM, Monday–Saturday).

Tokyo & Makuhari Satellite Outpatient Clinics: For patient convenience, attending physicians from our main hospital conduct consultations at our satellite centers:

Kameda Kyobashi Clinic (6-min walk from Tokyo Station / Direct access from Kyobashi Station)

Kameda MTG Clinic (2-min walk from Kaihin-Makuhari Station)
(Patients seeking surgery are encouraged to mention this when booking for seamless coordination).

Premium Inpatient Experience at K-Tower

Patients staying in K-Tower private rooms enjoy a healing environment with ocean views, thoughtful amenities, and wellness facilities:

Private Room Amenities: Free Wi-Fi, personal storage, refrigerator, sofa bed, private shower, toilet, vanity, and tea kettle. (Special VIP Suites available on the 12th Floor).

In-Hospital Wellness & Care: Access to the PonoPono Esthetic Salon (K-Tower 4F), Beauty Salon NANI (K-Tower 5F), and the 5th Floor Sky Lounge.

Conditions we handle

1. Benign Gynecological Conditions

Minimally Invasive Laparoscopy: Active use of advanced laparoscopic approaches for uterine fibroids and ovarian cysts, enabling swift recovery with hospital discharge typically in 3 to 4 days.

Hybrid & Cosmetically Preserved Procedures: For giant or multiple fibroids unsuitable for laparoscopic-only techniques, we perform Laparoscopic-Assisted Myomectomy or Mini-Laparotomy via a low mini-transverse incision to balance aesthetic outcomes, safety, and curability.

Hysteroscopic & Endometrial Therapies: Hysteroscopic resection for submucosal fibroids and endometrial polyps, as well as Microwave Endometrial Ablation (MEA) for menorrhagia (heavy menstrual bleeding).

2. Gynecological Malignancies & Precancers

Precision Cervical Conization: For high-grade cervical dysplasia (HSIL/CIN3), we utilize a Holmium:YAG Laser for precision tissue removal with minimal bleeding. Thermal coagulation preserves surrounding tissue regeneration, significantly reducing future risks of miscarriage or preterm delivery. (Note: Laser ablation alone without tissue histology is not performed, ensuring exact diagnostic accuracy).

Cervical Cancer: Comprehensive management offering surgery, chemotherapy, and in-house Concurrent Chemoradiotherapy (CCRT)—typically managed as a 1- month inpatient protocol for maximum safety and symptom management.

Uterine / Endometrial Cancer: Staging and curative surgeries tailored to disease extent. Laparoscopic staging is selected when clinically appropriate, strictly prioritizing oncological curability and patient safety.

Ovarian Cancer: Integrated surgical debulking and systemic chemotherapy. We collaborate with Clinical Genetics for genetic testing (BRCA/HRD) to guide targeted molecular therapies (PARP inhibitors).

Recurrent Cancer & Genomic Medicine: Advanced genetic profiling and targeted therapies provided in partnership with the Department of Medical Oncology and Cancer Genomics.

**Pelvic Floor Disorders & Incontinence Notice**
For treatment of Pelvic Organ Prolapse (uterine prolapse, cystocele) or urinary incontinence, please consult our specialized Urogynecology Center or Department of Urology.

Second Opinion & Satellite Care

Second Opinion Services: Available at Kameda Clinic (Kamogawa) for patients seeking expert evaluation on treatment plans.

Satellite Outpatient Care: Comprehensive evaluations and surgical consultations available at Kameda Kyobashi Clinic and Kameda MTG Clinic.

Number of cases

Total Outpatient Consultations (Ob/Gyn): 27,990 patients
Total Inpatient Admissions (Ob/Gyn): 9,379 patient days (or admissions)

(FY2024 Record)

List of Doctors

Director and Chairman, Department of Obstetrics and Gynecology / Clinical Professor

Isao OTSUKA

Subspeciality
Gynecologic Oncology

Department name	Gynecology
Medical School	Tokyo Medical and Dental University
Special Qualifications	Board Certified Obstetrician and Gynecologist / Instructor by the Japan Medical Specialty Organization Board Certified Gynecologic Oncologist / Instructor (Supervising Instructor for Gynecologic Oncology) by the Japan Society of Gynecologic Oncology Certified Women's Healthcare Specialist / Instructor by the Japan Society for Menopause and Women's Health Certified Cancer Therapy Physician by the Japan Organization for Board of Certification for Cancer Therapy Designated Physician under the Maternal Health Protection Law
Education & Career	March 1988: Graduated from Institute of Science Tokyo June 1988: Medical Hospital, Institute of Science Tokyo April 1989: Tsuchiura Kyodo General Hospital February 1991: Soka Municipal Hospital August 1991: Medical Hospital, Institute of Science Tokyo April 1992: Tokyo Metropolitan Komagome Hospital July 1994: Medical Hospital, Institute of Science Tokyo April 1995: Assistant, Department of Obstetrics and Gynecology, Faculty of Medicine, Institute of Science Tokyo January 1997: Medical Hospital, Institute of Science Tokyo April 1999: In-hospital Lecturer, Faculty of Medicine, Institute of Science Tokyo October 2002: Appointed as Director of Gynecology at this hospital / Clinical Professor and Part-time Lecturer at Institute of Science Tokyo October 2015: Director of Obstetrics and Gynecology (In charge of Gynecologic Oncology) April 2021: Director and Chairman of Obstetrics and Gynecology at this hospital

Deputy Director, Department of Obstetrics and Gynecology / Deputy Director, Department of Perinatology / Deputy Director, Department of Clinical Genetics

Mizuho KADOOKA

Subspeciality
Obstetrics and Gynecology, Perinatal Medicine, Fetal Ultrasound, Clinical Genetics

Department name	Gynecology
Medical School	Sapporo Medical University
Special Qualifications	Board Certified Obstetrician and Gynecologist / Instructor by the Japan Medical Specialty Organization Board Certified Perinatal Specialist / Leading Instructor (Maternal-Fetal) / Councilor by the Japan Society of Perinatal and Neonatal Medicine Board Certified Medical Ultrasound Specialist by the Japan Society of Ultrasonics in Medicine Certified Fetal Echocardiography Specialist / Representative by the Japanese Society of Fetal Cardiology Board Certified Clinical Geneticist by the Japan Society of Human Genetics / the Japanese Society for Genetic Counseling Certified Specialist in Genetic Counseling (Perinatal) by the Japanese Society for Genetic Counseling in Obstetrics and Gynecology Fetal Medicine Foundation (FMF) Certified for NT, NB, DV, and TR Measurements Neonatal Resuscitation Program (NRP) Instructor by the Japan Society of Perinatal and Neonatal Medicine Designated Physician under the Maternal Health Protection Law Completed J-CIMELS Basic Course by the Japan Collaboration of Maternal Medical Emergency Life Support Completed Online Medical Care Training Course designated by the Ministry of Health, Labour and Welfare
Education & Career	March 2007: Graduated from School of Medicine, Sapporo Medical University April 2007: Initial Clinical Resident at Asahi General Hospital April 2009: Specialty Resident, Department of Obstetrics and Gynecology, Asahi General Hospital April 2012: Staff Physician, Department of Obstetrics and Gynecology, Asahi General Hospital April 2013: Staff Physician, Department of Neonatology, Kagoshima City Hospital April 2014: Appointed as Obstetrician and Gynecologist at this hospital May 2021: Chief Physician of Obstetrics and Gynecology August 2021: Chief Physician of Obstetrics and Gynecology / Chief Physician of Perinatology October 2022: Chief Physician of Obstetrics and Gynecology / Chief Physician of Perinatology / Chief Physician of Clinical Genetics May 2024: Deputy Director, Department of Obstetrics and Gynecology / Deputy Director, Department of Perinatology / Deputy Director, Department of Clinical Genetics

Senior Physician, Department of Obstetrics and Gynecology / Senior Physician, Department of Perinatology

Takahiro MITANI

Subspeciality
Laparoscopic Surgery, Robotic Surgery, Perinatal Medicine, and General Obstetrics and Gynecology

Department name	Gynecology
Medical School	Kindai University
Special Qualifications	Board Certified Obstetrician and Gynecologist / Instructor by the Japan Medical Specialty Organization Board Certified Gynecologic Endoscopic Surgeon by the Japan Society of Gynecologic and Obstetric Endoscopy Da Vinci Certificate by the Association for Japan Robotic Surgery Board Certified Perinatal Specialist (Maternal-Fetal) by the Japan Society of Perinatal and Neonatal Medicine Completed ALSO Japan Instructor Course (Advanced Life Support in Obstetrics) Completed J-CIMELS Instructor Course by the Japan Collaboration of Maternal Medical Emergency Life Support Designated Physician under the Maternal Health Protection Law Certified Specialist in Genetic Counseling (Perinatal) by the Japanese Society for Genetic Counseling in Obstetrics and Gynecology Completed Online Medical Care Training Course designated by the Ministry of Health, Labour and Welfare
Education & Career	March 2011: Graduated from Faculty of Medicine, Kindai University April 2011: Initial Clinical Resident at Wakayama Medical University April 2013: Assistant Professor (In-Hospital), Department of Obstetrics and Gynecology, Wakayama Medical University May 2014: Department of Obstetrics and Gynecology, Hashimoto City Hospital March 2016: Assistant Professor (In-Hospital), Department of Obstetrics and Gynecology, Wakayama Medical University April 2018: Appointed as Obstetrician and Gynecologist at this hospital April 2020: Senior Physician of Obstetrics and Gynecology August 2021: Senior Physician of Obstetrics and Gynecology / Senior Physician of Perinatology

Senior Physician, Department of Obstetrics and Gynecology / Senior Physician, Department of Perinatology

Koji OTSUKA

Subspeciality
General Obstetrics and Gynecology

Department name	Gynecology
Medical School	University of Occupational and Environmental Health
Special Qualifications	Board Certified Obstetrician and Gynecologist / Instructor by the Japan Medical Specialty Organization Sports Doctor Certified by the Japan Sports Association (JSPO) Certified Health and Sports Physician by the Japan Medical Association Certified Cancer Therapy Physician by the Japan Organization for Certification of Cancer Therapy Board Certified Gynecologic Endoscopic Surgeon by the Japan Society of Gynecologic and Obstetric Endoscopy Designated Physician under the Maternal Health Protection Law ALSO Provider (Advanced Life Support in Obstetrics) Neonatal Resuscitation Program (NRP) "Advanced" Course (A Course) by the Japan Society of Perinatal and Neonatal Medicine Completed J-CIMELS Course (Japan Collaboration of Maternal Medical Emergency Life Support) Da Vinci Console Surgeon Certificate Completed Palliative Care Training Course for Physicians Engaged in Cancer Care Completed Online Medical Care Training Course designated by the Ministry of Health, Labour and Welfare Completed Clinical Residency Instructor Training Course designated by the Ministry of Health, Labour and Welfare
Education & Career	March 2013: Graduated from School of Medicine, University of Occupational and Environmental Health April 2013: Initial Clinical Resident at St. Luke's International Hospital April 2015: Department of Obstetrics and Gynecology, Seirei Hamamatsu Hospital April 2017: Department of Obstetrics and Gynecology, Sendai City Hospital April 2018: Department of Obstetrics, Gynecology and Reproductive Medicine, Suzuki Memorial Hospital April 2019: Senior Physician, Department of Obstetrics and Gynecology, Iwate Prefectural Iwai Hospital April 2020: Staff Physician, Department of Obstetrics and Gynecology, Kameda General Hospital August 2021: Staff Physician of Obstetrics and Gynecology / Staff Physician of Perinatology October 2023: Senior Physician of Obstetrics and Gynecology / Senior Physician of Perinatology

Senior Physician, Department of Obstetrics and Gynecology / Senior Physician, Department of Perinatology

Yoshihisa KANAMOTO

Subspeciality
Obstetrics and Gynecology

Department name	Gynecology
Medical School	Saitama Medical University
Special Qualifications	Board Certified Obstetrician and Gynecologist by the Japan Medical Specialty Organization Da Vinci First Assistant Surgeon Certificate Completed Online Medical Care Training Course designated by the Ministry of Health, Labour and Welfare
Education & Career	March 2015: Graduated from Faculty of Medicine, Saitama Medical University April 2015: Initial Clinical Resident, Post-Graduate Training Center at this hospital April 2017: Advanced Resident, Department of Obstetrics and Gynecology at this hospital April 2020: Staff Physician of Obstetrics and Gynecology August 2021: Staff Physician of Obstetrics and Gynecology / Staff Physician of Perinatology April 2024: Senior Physician of Obstetrics and Gynecology / Senior Physician of Perinatology

Staff Physician, Department of Obstetrics and Gynecology

Hikaru MORI

Subspeciality
Obstetrics and Gynecology

Department name	Gynecology
Medical School	Fukushima Medical University
Special Qualifications	Board Certified Obstetrician and Gynecologist / Instructor by the Japan Medical Specialty Organization Certified Women's Healthcare Specialist / Instructor by the Japan Society for Menopause and Women's Health Women's Healthcare Advisor Certified by the Japan Society of Obstetrics and Gynecology Designated Physician under the Maternal Health Protection Law Completed Neonatal Resuscitation Program (NRP) "Advanced" Course (A Course) by the Japan Society of Perinatal and Neonatal Medicine Completed Clinical Residency Instructor Training Course designated by the Ministry of Health, Labour and Welfare Completed Online Medical Care Training Course designated by the Ministry of Health, Labour and Welfare
Education & Career	March 2009: Graduated from School of Medicine, Fukushima Medical University April 2009: Tohoku Kosai Hospital April 2012: Tohoku University Hospital May 2012: Hachinohe City Hospital May 2013: Iwate Prefectural Chubu Hospital May 2014: Tohoku University Hospital October 2014: Appointed as Obstetrician and Gynecologist at this hospital October 2021: Entered Graduate School of Medicine, Tohoku University September 2025: Completed Graduate School of Medicine, Tohoku University

Staff Physician, Department of Obstetrics and Gynecology / Staff Physician, Department of Perinatology

Tomotaka KONO

Subspeciality
Obstetrics and Gynecology

Department name	Gynecology
Medical School	Juntendo University
Special Qualifications	Board Certified Obstetrician and Gynecologist by the Japan Medical Specialty Organization Designated Physician under the Maternal Health Protection Law J-MELS Basic Course Instructor (Japan Maternal Emergency Life Support) Completed J-MELS Advanced Course (Advanced Maternal Life Support) Completed ALSO® Provider Course (Advanced Life Support in Obstetrics / Certified by the American Academy of Family Physicians) Completed PC3 (Perinatal Critical Care Course for Maternal Emergencies and Team Management) Completed NCPR (Neonatal Cardio-Pulmonary Resuscitation) "Advanced" Course (A Course) Da Vinci First Assistant Surgeon Certificate (Robot-Assisted Surgery / Intuitive Surgical, Inc.) Completed Palliative Care Training Course for Physicians Engaged in Cancer Care
Education & Career	March 2018: Graduated from Faculty of Medicine, Juntendo University April 2018: Initial Clinical Resident at Asahi General Hospital April 2020: Staff Physician, Department of Obstetrics and Gynecology, Asahi General Hospital January 2024: Appointed as Staff Physician of Obstetrics and Gynecology / Staff Physician of Perinatology at this hospital

Staff Physician, Department of Obstetrics and Gynecology / Department of Perinatology