Nephrology & Hypertension

What we do

Formally renamed in April 2006 to reflect our expanded focus on hypertensive disorders, the Department of Nephrology & Hypertension operates as an integral component of the Kidney Center (comprising Nephrology & Hypertension, the Dialysis Center, the Dedicated Renal Ward, and Kidney Transplantation).

Accredited by the Japan Society of Nephrology, the Japanese Society for Dialysis Therapy, the Japanese Society of Hypertension, and the Japanese Society for Apheresis, our medical team—including board-certified specialists and instructors—provides seamless, integrated medical and surgical kidney care across South Boso and Chiba Prefecture.

Key Departmental Strengths & Clinical Scope

Integrated Kidney Center Network: Seamless collaboration between inpatient wards, outpatient clinics, the Dialysis Center, surgical transplantation, and regional satellite clinics.

Advanced Subspecialized Diagnostics & Therapies: High-volume expertise in diagnostic Kidney Biopsies, Peritoneal Dialysis (PD), LDL Apheresis, and continuous blood purification techniques.

Multidisciplinary Internal & Surgical Integration: Close co-management with internal medicine subspecialties (e.g., Hematology/Oncology, Rheumatology, Endocrinology) and surgical teams for complex secondary kidney diseases and renal transplantation.

Academic Collaboration & Clinical Research: Active joint research endeavors across hospital departments and partner academic institutions nationwide.

Conditions we handle

We provide expert evaluation, long-term management, and advanced interventions for a wide spectrum of renal and hypertensive conditions:

Chronic Kidney Disease (CKD): Early detection, progression delay, and comprehensive end-stage renal disease (ESRD) planning.

Primary & Secondary Glomerular Diseases: IgA Nephropathy, Nephrotic Syndrome, Lupus Nephritis, Diabetic Kidney Disease (Diabetic Nephropathy), and renal manifestations of hematologic or systemic collagen diseases.

Acute Kidney Injury (AKI): Rapid diagnostic workup, critical care nephrology, and acute renal replacement therapy.

Hypertension: Secondary hypertension screening and management of Resistant / Intractable Hypertension.

Blood Purification & Apheresis Therapies: Hemodialysis (HD), Peritoneal Dialysis (PD), LDL Apheresis, plasma exchange, and specialized immunoadsorption therapies.

Number of cases

Total Outpatient Consultations: 13,777 patients
Total Inpatient Admissions: 4,510 patient days (or admissions)

(2024 Performance)

Kidney Biopsies Performed: 138 cases

Peritoneal Dialysis (PD) Management: 42 active patients (12 new introductions in 2024)

Operation results

None

List of Doctors

Chief of Nephrology

Mamiko OHARA

Subspeciality
Nephrology, Blood Purification Therapy

Department name	Nephrology & Hypertension
Medical School	University of Kanazawa
Special Qualifications	PhD (Medical Science) Certified Internist / General Internal Medicine Specialist & Instructor (Japan) Nephrology Specialist & Instructor (Japan) Dialysis Specialist & Instructor (Japan) Hypertension Specialist & Instructor (Japan) Certified Aerospace Medicine Physician Fellow of the American College of Physicians (FACP) Fellow of the American Society of Nephrology (FASN) ICLS Instructor (Japan) JMECC Instructor (Japan) Completed Online Medical Care Training Completed Palliative Care Training
Education & Career	Mar 1989 – Graduated from Kanazawa University School of Medicine Department of Internal Medicine I, University of Tokyo University of Tokyo Hospital Toranomon Hospital Kidney Center Tokyo Metropolitan Komagome Hospital University of Colorado, Division of Nephrology & Hypertension (USA) Jul 2002 – Chief Physician, Nephrology Apr 2006 – Director, Nephrology & Hypertension Jun 2013 – Program Advisor, JST Apr 2019 – Director & Medical Education / Research leadership roles Jul 2022 – Concurrent Director roles Apr 2025 – Hospital Director / Department Director Apr 2026 – Director roles continued

Chief of Nephrology & Hypertension

Tomo SUZUKI

Subspeciality
Kidney Diseases In General ， Nephritis ， Renal Pathology

Department name	Nephrology & Hypertension
Medical School	St. Marianna University School of Medicine
Special Qualifications	Board Certified Specialist of The Japanese Society of Internal Medicine Board Certified Specialist of Japanese Society of Nephrology Board Certified Specialist of The Japanese Society for Dialysis Therapy Board Certified Specialist of Japanese Society for Apheresis Doctor of Medical Science (PhD) PKD Certified Physician (Polycystic Kidney Disease Association) Completed MHLW Designated Online Medical Care Training
Education & Career	2006 Mar. Graduated from St. Marianna University School of Medicine 2006 Apr. Junior Resident，The University of Tokyo Hospital 2007 Apr. Junior Resident，ASAMA General Hospital 2008 Apr. Senior Resident of Nephrology & Hypertension， Kameda Medical Center 2011 Apr. allergy，National Hospital Organization Chiba East Hospital 2012 Apr. Term Assistant Professor，St.Marianna University School of Medicine Hospital 2012 Aug. St. Marianna University School of Medicine， Yokohama City Seibu Hospital 2013 Apr. nephrology，Inagi Municipal Hospital 2014 Apr. Renal vascular pathology，University of Tsukuba Faculty of Medicine 2016 Apr. Assistant Professor，St.Marianna University School of Medicine Hospital 2018 Oct. Chief of Nephrology & Hypertension，Kameda Medical Center Nephrology & Hypertension，St.Marianna University School of Medicine Hospital (part-time)

Chief of Outpatient charge

Junko FUKUDA

Subspeciality
General Kidney Medicine
Blood Purification Therapy

Department name	Nephrology & Hypertension
Medical School	Tohoku University School of Medicine
Special Qualifications	Board Certified Specialist of The Japanese Society of Internal Medicine Board Certified Physician of The Japanese Society of Internal Medicine Board Certified Specialist and Advanced Certified Speialist of The Japanese Society for Dialysis Therapy Board Certified Specialist and Advanced Certified Speialist of Japanese Society of Nephrology
Education & Career	1992 Mar. Graduated from Tohoku University School of Medicine 1992 Jun. Junior Resident of Internal Medicine，National Center for Global Health and Medicine 1994 Jun. Senior Resident of Nephrology， National Center for Global Health and Medicine 1997 Jun. Nephrology，National Hospital Organization Disaster Medical Center 2001 Feb. Fukuda clinic (Part-time) 2002 Jan. Nephrology，Kawakita General Hospital 2004 Apr. Vice Chief of Nephrology，Kawakita General Hospital 2005 Apr. Chief of Nephrology，Kawakita General Hospital 2006 Apr. Chief of Nephrology And Dialysis room Director ，Kawakita General Hospital 2017 Sep. Chief of Nephrology， Kawasaki Municipal Hospital 2018 Apr. Chief of Nephrology & Hypertension Department of Outpatients，Kameda Medical Center

Chief Physician, Nephrology & Hypertension / Internal Medicine Lead, Kidney Transplantation Division

Mari IKEDA

Subspeciality
Nephrology & Hypertension

Department name	Nephrology & Hypertension
Medical School	Tokyo Women’s Medical University
Special Qualifications	Certified Internal Medicine Physician (Japan) Nephrology Specialist (Japan) Dialysis Specialist (Japan) PKD Certified Physician Board-certified Anesthesiology Practitioner
Education & Career	Mar 2010 – Graduated from Tokyo Women’s Medical University School of Medicine Apr 2010 – Initial Clinical Residency, Tokyo Women’s Medical University Yachiyo Medical Center Apr 2012 – Advanced Residency, General Medicine, Tokyo Bay Urayasu-Ichikawa Medical Center Apr 2014 – Advanced Residency, General Medicine, Nerima Hikarigaoka Hospital Apr 2015 – Instructor, Anesthesiology, Yokohama City University School of Medicine Jun 2015 – Anesthesiology, Yokohama City University Medical Center (rotation) Oct 2015 – Instructor, Anesthesiology, Yokohama City University School of Medicine Dec 2016 – Anesthesiology, Kanagawa Cardiovascular and Respiratory Center (rotation) Apr 2017 – Intensive Care Unit, Yokohama Rosai Hospital (rotation) Apr 2018 – Assistant Professor, Nephrology & Hypertension, St. Marianna University Apr 2023 – Staff Physician, Nephrology & Hypertension / Kidney Transplantation Division Oct 2024 – Chief Physician, Nephrology & Hypertension / Internal Medicine Lead, Kidney Transplantation

Internal Medicine Resident

Maiko SHIMOGAWA

Subspeciality
Internal Medicine, Nephrology, Dialysis

Department name	Nephrology & Hypertension
Medical School	Nagasaki University
Education & Career	Mar 2022 – Graduated from Nagasaki University School of Medicine Apr 2022 – Nagasaki Prefectural Goto Central Hospital Apr 2024 – Iizuka Hospital Jan 2025 – Keita Hospital Apr 2025 – Department of Nephrology & Hypertension, Current Hospital

Internal Medicine Resident

Izumi AOYAGI

Subspeciality
Nephrology

Department name	Nephrology & Hypertension
Medical School	Saga University
Education & Career	Mar 2023 – Graduated from Saga University School of Medicine Apr 2023 – National Hospital Organization Asahi General Hospital Apr 2024 – Chiba University Hospital Apr 2025 – Department of Nephrology & Hypertension, Current Hospital

Internal Medicine Resident

Shunichi SUETSUGU

Subspeciality
Nephrology & Hypertension

Department name	Nephrology & Hypertension
Medical School	Okayama University
Education & Career	Mar 2022 – Graduated from Okayama University School of Medicine Apr 2022 – Aso Iizuka Hospital Co., Ltd. Apr 2024 – National Hospital Organization Kyushu Medical Center Apr 2025 – Aso Iizuka Hospital Co., Ltd. Apr 2026 – Internal Medicine Resident, Department of Nephrology & Hypertension, Kameda Medical Center

Internal Medicine Resident

Jota ASAKAWA

Subspeciality
Nephritis and Immune-related Disorders

Department name	Nephrology & Hypertension
Medical School	Showa University
Education & Career	Mar 2023 – Graduated from Showa University School of Medicine Apr 2024 – Saiseikai Central Hospital, Tokyo Apr 2026 – Toranomon Hospital (Mutual Aid Association of Public School Teachers) Apr 2026 – Internal Medicine Resident, Department of Nephrology & Hypertension, Kameda Medical Center

Resident (Specialist Trainee)

Tomoka KATAOKA

Subspeciality
Dialysis

Department name	Nephrology & Hypertension
Medical School	St. Marianna University School of Medicine
Education & Career	Mar 2023 – Graduated from St. Marianna University School of Medicine Apr 2023 – Sagamihara Kyodo Hospital (JA Kanagawa Prefectural Welfare Federation of Agricultural Cooperatives) Apr 2025 – Department of Nephrology, Showa Medical University Hospital Apr 2026 – Resident (Specialist Trainee), Department of Nephrology & Hypertension, Kameda Medical Center

Part-time Physician

Masatoshi MATSUNAMI

Subspeciality
Kidney Transplantation, Hemodialysis, Peritoneal Dialysis, Vascular Access

Department name	Nephrology & Hypertension
Medical School	Kanazawa Medical University
Special Qualifications	Doctor of Medicine (Ph.D.) Master of Business Administration (MBA) Board-Certified Surgeon and Instructor, Japan Surgical Society Board-Certified Nephrologist and Instructor, Japanese Society of Nephrology Board-Certified Dialysis Specialist and Instructor, Japanese Society for Dialysis Therapy Certified Endovascular VA Specialist, Japanese Society for Dialysis Therapy Certified Physician, Japanese Society for Peritoneal Dialysis Certified Transplant Physician, Japan Society for Transplantation Certified Kidney Transplant Physician, Japanese Society of Clinical Renal Transplantation Certified Endovascular VA Specialist, Japanese Society for Dialysis Access Certified VAIVT Specialist, Japanese Society for Dialysis Vascular Access Intervention Therapy Certified VAIVT Endovascular Physician, Japanese Society for Dialysis Vascular Access Intervention Therapy
Education & Career	March 2009 – Graduated from the Faculty of Medicine, Kanazawa Medical University April 2009 – Junior Resident, Postgraduate Clinical Training Center, our hospital April 2011 – Senior Resident, Department of Surgery April 2013 – Senior Resident, Department of Gastrointestinal Surgery April 2014 – Fellow, Transplant Surgery, National Center for Child Health and Development November 2015 – Research Fellow, Transplant Surgery, Massachusetts General Hospital, Harvard Medical School, USA May 2017 – Staff Surgeon, Kidney Center Surgery, Toranomon Hospital March 2019 – Completed Graduate School of Medicine, Kanazawa Medical University January 2020 – Part-time Contract Physician, Department of Nephrology, Toranomon Hospital Branch March 2021 – Completed Graduate School of Business Administration, Keio University April 2021 – Department of Nephrology and Hypertension / Concurrent Appointment, Kidney Transplant Surgery, our hospital July 2021 – Chief Physician, Department of Nephrology and Hypertension / Concurrent Appointment, Kidney Transplant Surgery, our hospital October 2022 – Doctoral Research Fellow, Department of Clinical Epidemiology, Fukushima Medical University Graduate School of Medicine April 2023 – Deputy Director, Department of Nephrology and Hypertension / Concurrent Appointment, Kidney Transplant Surgery, our hospital April 2026 – Part-time Physician, Department of Nephrology and Hypertension / Kidney Transplant Surgery, our hospital

Part-time Physician

Takahiro INOUE

Subspeciality
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Department name	Nephrology & Hypertension
Medical School	Nippon Medical School
Special Qualifications	Certified Internal Medicine Physician (Japan) Dialysis Specialist (Japan) Certified Instructor Japanese Society for Acute Blood Purification Nephrology Specialist (Japan) Transplant Certified Physician (Japan) Clinical Renal Transplant Certified Physician (Japan) Completed Clinical Training Instructor Course
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