Surgical Oncology

What we do

The Department of Surgical Oncology specializes in complex, high-difficulty surgical care for advanced malignancies, rare tumors, and recurrent cancers. Because advanced tumors often extend beyond a single organ, effective treatment requires an integrated, cross-specialty approach.

Integrated Multidisciplinary Care & Dual Perspectives

Surgical Expertise Across Multiple Organ Systems: We collaborate closely with specialized surgical teams—including Gastroenterological, Thoracic, Urological, Cardiovascular, Orthopedic, Gynecological, and Plastic & Reconstructive Surgery—to perform complex multi-organ resections and advanced anatomical reconstructions.

Comprehensive Internal & Palliative Management: When complete surgical cure is not feasible due to advanced disease stages, we perform targeted palliative or functional surgeries (e.g., restoring enteral nutrition, relieving bowel obstructions, or alleviating severe pain) to enable subsequent chemotherapy or radiation therapy and improve quality of life.

Integrated Oncology Network: Surgical treatment is positioned as one vital component within a broader, long-term care plan. We work side-by-side with the Department of Medical Oncology and the Department of Sarcoma to establish individualized treatment strategies.

Consultations & Patient Support

Seeking Help with Refractory or Complex Cancer Diagnoses?

Our surgical oncologists are dedicated to walking alongside patients and their families to find the best possible therapeutic pathways for complex, difficult-to-treat tumors.

Direct Consultation Helpline: +81-470-99-1323 (Oncology Surgery Coordinator: Mr. Obata)

Conditions we handle

We provide specialized evaluation and surgical interventions for:

Refractory & Rare Tumors: Soft tissue sarcomas and complex mesenchymal neoplasms
Advanced & Recurrent Malignancies: Metastatic cancers, recurrent tumors, and locally advanced carcinomas

Number of cases

(Department established in November 2019)

1. Total Sarcoma Surgery Volume

2021 (Jan – Dec 2021): 86 cases
2022 (Jan – Dec 2022): 96 cases

2. Surgical Volume by Histological Type

Histological Subtype / Diagnosis	2021 (Cases)	2022 (Cases)
Uterine Leiomyosarcoma (Uterine origin, mostly recurrent post-initial surgery)	40	29
Non-Uterine Leiomyosarcoma (IVC, mesentery, intestinal wall, retroperitoneum, stomach, etc.)	4	9
Retroperitoneal Liposarcoma	31	37
Non-Retroperitoneal Liposarcoma (Spermatic cord, etc.)	1	0
Endometrial Stromal Sarcoma	3	3
Uterine Carcinosarcoma	1	3
Adenosarcoma	2	1
Gastrointestinal Stromal Tumor (GIST)	1	4
Undifferentiated Pleomorphic Sarcoma (UPS)	1	3
Malignant Solitary Fibrous Tumor (SFT)	1	3
Malignant Peripheral Nerve Sheath Tumor (MPNST)	1	0
Synovial Sarcoma	0	1
Other Histologies	0	3
Total Surgical Cases	86	96

3. Surgical Breakdown by Procedure & Combined Resections

Surgical Procedure / Combined Resection Type	2021 (Cases)	2022 (Cases)
Simple Tumor Resection	28	39
Combined Organ Resections:
└ Stomach	1	2
└ Duodenum	0	2
└ Small Intestine	26	19
└ Colon	9	20
└ Low Anterior Resection of Rectum	7	3
└ Colostomy / Hartmann's Procedure	2	1
└ Partial Bladder / Ureter Resection (Excluding Total Pelvic Exenteration)	13	11
└ Total Pelvic Exenteration4	4	1
└ Kidney	3	3
└ Liver	1	0
└ Gallbladder	2	5
└ Pancreas	4	2
└ Appendix	3	0
└ Inferior Vena Cava / IVC	1	3
└ Lung	3	0
└ Vertebral Arch / Laminectomy	1	0
└ Uterus	1	2
└ Ovary	1	5
└ Diaphragm	3	3

List of Doctors

Chief of Surgical Oncology

Yasuo ONO

Subspeciality
Surgical treatment for malignant tumors of the thoracoabdominal region，
Surgical treatment especially for recurrence

Department name	Surgical Oncology
Medical School	Hokkaido University School of Medicine
Special Qualifications	Board Certified Specialist and Advanced Certified Speialist of Japan Sarcoma Association
Education & Career	1981 Mar. Graduated from Hokkaido University School of Medicine 1981 May. Ehime University Hospital 1981 Aug. Japan Community Health care Organization Uwajima Hospital 1982 Apr. Medical Corporation Hokutokai Oozuchuo Hospital 1985 Jan. Kanto Central Hospital of the Mutual Aid Association of Public School Teachers 1989 Aug. Japan Anti-Tuberculosis Association Shin-yamanote Hospital 1993 May. Medical Corporation Hokutokai Oozuchuo Hospital 1995 Sep. Kanto Central Hospital of the Mutual Aid Association of Public School Teachers 2009 Jan. Fuchinobe General Hospital 2019 Nov. Chief of Surgical Oncology， Kameda Medical Center

Deputy Chief, Department of Urology; Assistant Chief, Surgical Oncology; Director in charge of surgery, Renal Transplant Center

Atsuhiko OCHI

Subspeciality
Urological / retroperitoneal tumors (renal cell carcinoma, upper tract urothelial carcinoma, bladder cancer, adrenal tumor), renal failure (renal transplantation)

Department name	Surgical Oncology
Medical School	Kanazawa University
Special Qualifications	M.D., Ph.D. JUA Board Certified Urologist / Instructor Certified Urologist in the Endoscopic Surgical Skill Qualification System of the Japanese Urological Association and the Japanese Society of Endourology and Robotics Board Certified Physician in Endoscopic Surgery of the Japanese Society for Endoscopic Surgery (urologic laparoscopy) Certified Transplant Physician of the Japan Society for Transplantation Certified Specialist in Renal Transplantation of the Japanese Society for Clinical Renal Transplantation Certified Physician of the Japanese Board of Cancer Therapy Certified Specialist / Instructor of the Japanese Sarcoma Association Da Vinci console surgeon certificate Completed the clinical training instructor workshop Completed the palliative care praining program Completed the online medical care training program designated by the Ministry of Health, Labour and Welfare
Education & Career	Mar 2005: Graduated from School of Medicine, Kanazawa University Apr 2005: Junior Resident, Postgraduate Education Center, Kameda Medical Center Apr 2007: Senior Rsident, Department of Urology Apr 2011: Assistant Chief, Department of Urology Oct 2016: Assistant Chief, Department of Urology; Staff Physician, Renal Transplant Center Mar 2017: Assistant Chief, Department of Urology / Renal Transplant Center Dec 2018: Assistant Chief, Department of Urology; Director in charge of surgery, Renal Transplant Center Sep 2020: Completed the doctoral course, Graduate School of Medical and Dental Sciences (Department of Clinical Anatomy), Institute of Science Tokyo (formerly Tokyo Medical and Dental University) Sep 2021: Visiting Professor (laparoscopic urological surgery), Faculty of Medicine, Thammasat University (Thailand) Apr 2022: Assistant Chief, Department of Urology; Assistant Chief, Surgical Oncology; Director in charge of surgery, Renal Transplant Center Aug 2023: Deputy Chief, Department of Urology; Assistant Chief, Surgical Oncology; Director in charge of surgery, Renal Transplant Center

Andrology