Cardiovascular

What we do

Established in 1983 by Dr. Toyama—who honed and practiced cardiovascular surgery in the United States for over a decade—our department provides high-safety, quality-of-life (QoL) focused surgical care. We welcome patients from across the Greater Tokyo Metropolitan Area and beyond, helping them achieve excellent outcomes and a rapid return to daily life.

To ensure continuous, high-quality emergency and critical care, our surgeons, specialized nurses, and clinical engineers reside near the hospital, fully prepared to deliver optimal surgical treatment 24 hours a day, 365 days a year.

Department Highlights & Advanced Surgical Capabilities

Rooted in American healthcare standards, our department emphasizes subspecialized expertise and patient-centered, highly accurate surgical interventions:

Off-Pump Coronary Artery Bypass Grafting (OPCAB / Off-Pump CABG): For angina and myocardial infarction, we prioritize long-term graft patency by using the patient’s own arterial conduits. We perform beating-heart (off-pump) bypass surgery as our standard to minimize surgical stress on the body.

Minimally Invasive Cardiac Surgery (MICS) & Valve Repair: For valvular heart disease, our primary goal is maintaining optimal post-operative quality of life while minimizing the long-term need for anticoagulation medications (blood thinners). We actively perform Right Mini-Thoracotomy MICS (even for elderly patients) to reduce recovery time. When valve replacement is required, we carefully select the most suitable prosthetic valve through thorough patient shared decision-making.

Surgical Treatment for Arrhythmias: We actively perform surgical ablation for arrhythmias (such as atrial fibrillation) concurrently with valve procedures, allowing many patients to avoid long-term anticoagulation therapy post-surgery.

Aortic Aneurysm Repair (TEVAR / EVAR): To prevent life-threatening aortic ruptures, we perform both open surgical repair and minimally invasive endovascular aortic repair—including Thoracic Endovascular Aortic Repair (TEVAR) and Endovascular Aortic Repair (EVAR)—ensuring high safety profiles even for high-risk patients.

Transcatheter Aortic Valve Replacement (TAVR / TAVI): In close collaboration with our Cardiology team, our cardiovascular surgeons actively participate as primary operators in catheter-based TAVR/TAVI procedures.

(Updated: January 8, 2025 | Medical Lead: Dr. Hiroaki Tanabe, Director of Cardiovascular Surgery)

Conditions we handle

(1) Ischemic heart diseases such as angina pectoris and myocardial infarction
(2) Aortic valve, mitral valve disease
(3) Aortic disease of the chest and abdomen
(4) Surgical treatment of arrhythmia

Number of cases

Total Outpatient Visits: 2,678 patients
Total Inpatient Admissions: 4,279 patient days (or admissions)

(FY2024 Results)

List of Doctors

Directorof Cardiac & Vascular Surgery

Hiroaki TANABE

Subspeciality
Cardiovascular Surgery

Department name	Cardiovascular
Medical School	Tokyo University
Special Qualifications	Board-Certified Cardiovascular Surgeon (Japanese Board of Cardiovascular Surgery) Board-Certified Surgeon (Japan Surgical Society) Certified Transcatheter Aortic Valve Replacement (TAVR) Operator Clinical Professor, Tokyo Medical and Dental University Faculty of Medicine Completed MHLW Designated Online Medical Care Training
Education & Career	1984 Mar. Graduate from Tokyo University， School of Medicine 1984 May Department of Emergency， Tokyo University Hospital 1985 Jul. Department of General Surgery. Kameda Medical Center 1989 Feb. Department of General Surgery， Tokyo Metropolitan Cancer and Infectious diseases Center Komagome Hospital 1989 May Department of Cardiovascular Surgery， Kameda Medical Center 1992 May Assistant Chief of Cardiovascular Surgery， Kameda Medical Center 1994 Dec. Assistant Prof. of Department of General Surgery， Saitama University 1999 May Lecturer of Department of General Surgery， Saitama University 2002 Aug. Chief of General Surgery， The Cardiovascular Institute 2006 Sep. Vice President of The Cardiovascular Institute 2013 Sep Director of Cardiology， Kameda Medical Center

Adviser of Cardiac & Vascular Surgery

Masaaki TOYAMA

Subspeciality
Cardiovascular Surgery， Angina Pectoris， Myocardial Infarction， Valvular Disorder， Surgecal Treatment for Arrhythmia

Department name	Cardiovascular
Medical School	Keio University School of Medicine
Special Qualifications	Board Certified Physician of Japanese Society of Cardiovascular Surgery Board Certified Physician and Specialist of The Japanese Association for Thoracic Surgery Certified Surgeon of Japan Surgical Society Board Advanced Certified Specialist of the clinical training performed by a foreign medical practitioner，authorized by Ministry of Health， Labour and Welfare Board Advanced Certified Specialist of The Japanese Board of Cardiovascular Surgery
Education & Career	1967: Graduated from Keio Univ. School of Medicine. 1970: General and Thoracic Surgery Residency at Buffalo General Hospital. Kansas University Medical Center and Others. 1978: Cardiovascular Surgeon in Miami (Baptis Hospital South Miami Hospital and Cedars Medical Center) 1983: Cardiovascular Surgeon at Kameda Medical Center. Visiting professor of Peking University and Soochow University， China. Licenced Surgeon in Both Japan and U.S.. 2012. Apr. Adviser of Cardiovascular Surgery， Kameda Medical Clinic

Acting Director, Cardiovascular Surgery

Yuji KATO

Subspeciality
Cardiovascular Surgery
Thoracic Surgery
Endovascular Stent Graft Therapy
Varicose Veins of the Lower Extremities

Department name	Cardiovascular
Medical School	Nagasaki University
Special Qualifications	Board-Certified Cardiovascular Surgeon (Japanese Board of Cardiovascular Surgery) Certified Transcatheter Aortic Valve Replacement (TAVR) Operator Board-Certified Surgeon (Japan Surgical Society) Certified Instructor for Abdominal Aortic Stent Graft Procedures (Gore Excluder, Endurant) Certified Operator for Abdominal Aortic Stent Graft Procedures (AFX) Certified Instructor for Abdominal Aortic Stent Graft Procedures (AORFIX AAA) Certified Instructor for Thoracic Stent Graft Procedures (GORE TAG Thoracic Endoprosthesis) Certified Instructor for Thoracic Stent Graft Procedures (Zenith TX2 / Alpha) Certified Operator for Thoracic Stent Graft Procedures (Valiant, TX2, TAG) Certified Instructor for Thoracic Stent Graft Procedures (Relay Plus / Pro) Certified Instructor for Endovenous Laser Ablation Therapy for Varicose Veins Board-Certified Cardiologist (Japanese Circulation Society) Certified Perioperative Transesophageal Echocardiography Specialist Completed MHLW Designated Online Medical Care Training
Education & Career	March 2003: Graduated from Nagasaki University School of Medicine May 2003: Tokyo Saiseikai Central Hospital June 2005: Joined this hospital and completed one year of training at Kitasato Institute Hospital August 2006: Senior Resident, Department of Cardiovascular Surgery, this hospital January 2012: Appointed Chief Physician, Department of Cardiovascular Surgery May 2014: Clinical Fellow, John Hunter Hospital, Australia March 2017: Appointed Chief Physician, Department of Cardiovascular Surgery, this hospital May 2026: Appointed Acting Director, Department of Cardiovascular Surgery

Acting Director, Cardiovascular Surgery

Kimio HOSAKA

Subspeciality
Cardiovascular Surgery
Endovascular Stent Graft Therapy

Department name	Cardiovascular
Medical School	Kitasato University
Special Qualifications	Board-Certified Surgeon (Japan Surgical Society) Board-Certified Cardiovascular Surgeon (Japanese Board of Cardiovascular Surgery) Certified Operator and Instructor for Abdominal Aortic Stent Graft Procedures (Gore Excluder Endoprosthesis, ENDURANT) Certified Operator for Abdominal Aortic Stent Graft Procedures (AFX) Certified Operator for Thoracic Stent Graft Procedures (Gore TAG Thoracic Endoprosthesis, Relay Plus/Pro) Board-Certified Cardiologist (Japanese Circulation Society) Completed MHLW Designated Online Medical Care Training
Education & Career	March 2015: Graduated from Kitasato University School of Medicine April 2015: Initial Resident, Postgraduate Training Center, this hospital April 2017: Senior Resident, Department of Cardiovascular Surgery, this hospital April 2022: Staff Physician, Department of Cardiovascular Surgery May 2026: Acting Director, Department of Cardiovascular Surgery

Senior Resident

Motomu MIYAGI

Department name	Cardiovascular
Medical School	University of the Ryukyus
Education & Career	March 2020: Graduated from University of the Ryukyus School of Medicine April 2020: Initial Residency, Chubu Tokushukai Hospital April 2022: Department of Surgery, Chubu Tokushukai Hospital April 2023: Department of Cardiovascular Surgery, NewHeart Watanabe Institute

Surgical Resident

Shiori KIMURA

Department name	Cardiovascular
Medical School	The University of Tokyo
Education & Career	March 2023: Graduated from The University of Tokyo Faculty of Medicine April 2023: Takeda General Hospital April 2025: Department of Cardiovascular Surgery, this hospital

Physical Therapist

Yuki HASEGAWA

Subspeciality
Physical Therapy
Respiratory Therapy

Department name	Cardiovascular
Medical School	International University of Health and Welfare; University of Toledo (Ohio, USA)
Special Qualifications	Registered Respiratory Therapist – Neonatal/Pediatric Specialist (RRT-NPS, USA)
Education & Career	March 1999: Graduated from International University of Health and Welfare April 1999: Department of Rehabilitation, Saitama Medical University May 2008: Graduated from the University of Toledo, Ohio, USA February 2011: Rehabilitation Department, this hospital October 2017: Cardiovascular Surgery Department