General Medicine

What we do

Our department serves as a primary care clinic for adults ("your adult family doctor"). You can think of us as a modern version of general internal medicine, highly skilled in diagnosing and treating common, everyday illnesses.

Please visit us under the following circumstances:

1. When you are unsure which specialized department you should visit.
2. When you want a dedicated physician to provide holistic, whole-person care for all your health concerns.

Examples for Scenario 1:
Suppose you have had a persistent fever for 3 weeks and want to be evaluated, but you do not know which department to go to because the cause of the fever is unclear—whether it is an infection (such as pneumonia, urinary tract infection, or cholecystitis), a collagen/autoimmune disease (such as rheumatoid arthritis), or a tumor (such as lymphoma). In such cases, please consult our department first. If inpatient care is required, we will arrange admission either to our department or to the most appropriate specialty ward. Furthermore, if an outpatient referral to another specialist is necessary, we will seamlessly introduce you to the correct department; if your condition can be fully diagnosed and treated within our department, we will manage it here directly.

Examples for Scenario 2:
Suppose a patient with multiple chronic conditions currently visits Cardiology for hypertension and atrial fibrillation, Endocrinology for hyperlipidemia, and Pulmonology for emphysema. Depending on the patient's stability, our General Internal Medicine team can consolidate and manage all of these conditions together in a single clinic. This approach minimizes drug duplication and adverse drug interactions while making it easier to prioritize treatments. Naturally, if a condition requires specialized evaluation, we will explain this clearly and refer you to the appropriate specialist. Additionally, you can consult us regarding necessary vaccinations (such as influenza and pneumococcal vaccines) and essential health screenings. All medical care is delivered through shared decision-making tailored to each patient's individual condition, based on sound scientific evidence.

Outpatient Care System

Our General Internal Medicine outpatient clinic is staffed by a rotating team of over 30 physicians, with 6 to 10 doctors consulting in the morning and 3 to 6 doctors in the afternoon. Our physicians and medical staff collaborate closely to provide compassionate medical care that ensures our patients feel safe, reassured, and satisfied.

Important Guidance Regarding Medical Referrals

If you are visiting our department for symptoms that have already been evaluated at another medical institution, please be sure to bring a formal letter of referral (Patient Introduction Document). Direct communication between physicians via a referral letter prevents redundant diagnostic testing, leads to a faster and more accurate diagnosis, and ultimately results in better treatment outcomes. We kindly ask for your cooperation for the sake of your own health and care quality.

Conditions we handle

Common Acute & Everyday Illnesses: Acute temporary conditions including the common cold/flu, gastroenteritis, pneumonia, urinary tract infections (UTI), cellulitis, pharyngitis, tuberculosis, sepsis, influenza, infectious mononucleosis, herpes zoster (shingles), and temporary depressive episodes.

Chronic Lifestyle-Related Conditions: Long-term management of hypertension (high blood pressure), diabetes mellitus, hyperlipidemia (high cholesterol), gout, pulmonary emphysema, atrial fibrillation, osteoporosis, hypothyroidism, etc.

Lifestyle & Health Behavior Modifications: Guidance for smoking cessation, alcohol reduction, weight management, and healthy living.

Mental & Emotional Health Support: Evaluation for patients experiencing depressed mood, anxiety, or high stress who may feel hesitant or uncomfortable directly visiting a psychiatric clinic.

Preventive Healthcare, Wellness & Bioethics: Health consultations for individuals currently without active disease who wish to maintain wellness, receive preventive care, or discuss advance care planning (end-of-life care decisions and medical ethics).

Polypharmacy & Multi-Specialty Coordination: Consultation for patients seeing multiple physicians/departments who wish to consolidate their care, streamline prescriptions, reduce drug burden, or seek clarity when presenting with multiple overlapping symptoms.

Primary Care Establishment: Anyone seeking to establish a long-term relationship with a dedicated primary care physician ("family doctor").

Please feel free to consult us regarding any health concerns.

Number of cases

Outpatient clinics: 33,198 patients per year
In-patient care: 24,565 patients annually
(FY2024 Record)

List of Doctors

Chief, Department of Laboratory Medicine; Chief, Department of Infectious Diseases; Chief, Regional Infectious Disease Surveillance and Prevention Center

Naoto HOSOKAWA

Subspeciality
Department of General Medicine: general internal medicine, general infectious diseases, diseases with fever, diseases caused by microorganisms
Department of Infectious Diseases: diseases caused by microorganisms, travel medicine
Department of Laboratory Medicine: laboratory medicine, management of clinical laboratory
Education of regidents

Department name	General Medicine
Medical School	Nihon University
Special Qualifications	Board Certified Member of the Japanese Society of Internal Medicine, Fellow of the Japanese Society of Internal Medicine (FJSIM), JSIM appointed physician for fellowship training Board Certified Member / Supervising Physician of the Japanese Association for Infectious Diseases Board Certified Member of the Japanese Society of Laboratory Medicine Infection Control Doctor certified by the Japanese Committee for Infection Control Doctors Japanese Antimicrobial Chemotherapy Physician (JACP), Fellow of JACP Certified Physician of the Japanese Society for Clinical Microbiology Medical worker certified by the Japanese Society of Travel and Health M.D., Ph.D.
Education & Career	Mar 1990: Nihon University School of Medicine May 1990: Resident, Nihon University Itabashi Hospital May 1992: Assistant, Division of Pediatrics, Department of Medicine, Nihon University School of Medicine May 1993: Department of Clinical Pathology (currently Department of Clinical Laboratory Medicine), Nihon University School of Medicine May 2005: Joined to Department of Infectious Diseases, Kameda Medical Center Aug 2005: Assistant Chief, Department of Infectious Diseases Jul 2006: Chief, Department of Laboratory Medicine; Assistant Chief, Department of General Medicine / Infectious Diseases Apr 2006: Chief, Department of Laboratory Medicine; Deputy Chief, Department of General Medicine / Infectious Diseases Feb 2009: Chief, Department of Laboratory Medicine; Deputy Chief, Department of General Medicine / Infectious Diseases; Chief, Infection Control Room Apr 2010: Chief, Department of Laboratory Medicine; Chief, Department of General Medicine / Infectious Diseases; Chief, Infection Control Room Jul 2013: Chief, Department of Laboratory Medicine; Chief, Department of General Medicine / Infectious Diseases; Chief, Regional Infectious Disease Surveillance and Prevention Center pr 2014: Chief, Department of Laboratory Medicine; Chief, Department of Infectious Diseases; Chief, Regional Infectious Disease Surveillance and Prevention Center Jun 2023: Chief, Department of Laboratory Medicine; Chief, Department of Infectious Diseases; Chief, Regional Infectious Disease Surveillance and Prevention Center

Chief, Department of Infectious Diseases

Ryosuke OSAWA

Subspeciality
General infectious diseases, transplant infectious diseases, tuberculosis

Department name	General Medicine
Medical School	Tokyo University
Special Qualifications	ABIM Board Certified in Internal Medicine ABIM Board Certified in Infectious Diseases Certificate in Travel Health, International Society of Travel Medicine Board Certified Member / Supervising Physician of the Japanese Association for Infectious Diseases Board Certified Member of the Japanese Society of Internal Medicine Completed “Clinical Training Instructor Workshop” hosted by the Ministry of Health, Labour and Welfare
Education & Career	Mar 2001: Graduated from Faculty of Medicine, Tokyo University Apr 2001: Medical Intern, US Naval Hospital Yokosuka Jun 2002: Resident, Department of Internal Medicine, The University of Tokyo Hospital Jul 2003: Resident, Department of Internal Medicine, Beth Israel Medical Center Jul 2006: Chief Resident, Department of Internal Medicine, Beth Israel Medical Center Jul 2007: Fellow, Department of Infectious Diseases, University of Pittsburgh Jul 2008: Master of Science in Clinical Research, University of Pittsburgh School of Medicine Jul 2009: Fellow, Department of Transplant Infectious Diseases, University of Pittsburgh Aug 2010: Assistant Professor, Department of Internal Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo Aug 2010: Staff, Department of Infectious Diseases, Buffalo General Medical Center Aug 2010: Staff, Department of Infectious Diseases, Roswell Park Comprehensive Cancer Center Jan 2013: Medical co-Director, Erie County Department of Health (ECDOH) Tuberculosis (TB) Clinic Sep 2018: Joined Kameda Medical Center as Deputy Chief, Department of Infectious Diseases Sep 2019: Chief, Department of Infectious Diseases Jun 2023: Chief, Department of Infectious Diseases

Chief, Department of Infectious Diseases (being seconded to other hospital)

Ryota HASE

Subspeciality
Infectious Disease，General Medicine，Outpatient Parenteral Antimicrobial Therapy（OPAT）

Department name	General Medicine
Medical School	Kanazawa University
Special Qualifications	Board Certified Member of the Japanese Society of Internal Medicine, Fellow of the Japanese Society of Internal Medicine (FJSIM) Board Certified Member of the Japanese Association for Infectious Diseases Certificate in Travel Health, International Society of Travel Medicine Infection Control Doctor certified by the Japanese Committee for Infection Control Doctors
Education & Career	Mar 2005: Graduated from School of Medicine, Kanazawa University Apr 2005: Junior Resident, Teine Keijinkai Hospital Apr 2008: Joined Kameda Medical Center as Senior Resident, Department of General Medicine / Infectious Diseases Apr 2010 : Fellow, Department of General Medicine / Infectious Diseases Apr 2012: Staff Physician, Department of General Medicine / Infectious Diseases Apr 2014: Assistant Chief, Department of General Medicine / Infectious Diseases Apr 2014: Deputy Chief, Department of Infectious Diseases Jul 2015: Seconded to Japanese Red Cross Narita Hospital Apr 2016: Chief, Department of Infectious Diseases; Being seconded to Japanese Red Cross Narita Hospital Jun 2023: Chief, Department of Infectious Diseases; Being seconded to Japanese Red Cross Narita Hospital

Chief of Emergency

Masaki OHASHI

Subspeciality
Emergency care of Internal Medicine

Department name	General Medicine
Medical School	Osaka City University， School of Medicine
Special Qualifications	Board Certified Specialist of Japanese Association for Acute Medicine Board Certified Sports Doctor of Japan Sports Association
Education & Career	1996.Mar. Graduated from Osaka City University， School of Medicine 1997.Nov. Residency in Kameda Medical Center 2001.Jul. Emergency and Trauma Department， Kameda Medical Center 2005.Nov. Assistant Chief of Emergency and Trauma Department， Kameda Medical Center 2009.Apr. Vice Chief of Emergency and Trauma Department， Kameda Medical Center 2012.Apr. Chief of Emergency and Trauma Department， Kameda Medical Center 2014.Apr. Chief of Emergency and Trauma Department， Vice Chief of Emergency and Trauma Center， Kameda Medical Center

Deputy Chief, Department of Infectious Diseases

Yosuke EBISU

Subspeciality
Internal medicine, infectious diseases, transplant infectious diseases

Department name	General Medicine
Medical School	Kyoto Prefectural University of Medicine
Special Qualifications	Board Certified Member of the Japanese Society of Internal Medicine Board Certified Member of the Japanese Society of Internal Medicine, General Internal Medicine Board Certified Member of the Japanese Association for Infectious Diseases ABIM Board Certified in Internal Medicine ABIM Board Certified in Infectious Diseases
Education & Career	Mar 2005: Graduated from Kyoto Prefectural University of Medicine, School of Medicine Apr 2005: Junior Resident, Shonan Kamakura General Hospital Apr 2007: Department of General Medicine / Infectious Diseases, Kameda Medical Center Apr 2010: Department of Internal Medicine, Awa Regional Medical Center Apr 2011: Medical Intern, US Naval Hospital Yokosuka Apr 2012: Department of Internal Medicine, Nerima Hikarigaoka Hospital Jul 2013: Fellowship program, Department of Infectious Diseases, University of New Mexico Jul 2015: Residency program, Department of Internal Medicine, University of New Mexico Jul 2018: Fellowship program, Department of Transplant Infectious Diseases, Jackson Memorial Hospital, University of Miami Aug 2019: Joined Kameda Medical Center as Deputy Chief, Department of General Medicine Aug 2022: Deputy Chief, Department of Infectious Diseases Jun 2023: Deputy Chief, Department of Infectious Diseases

Assistant Chief, Department of Infectious Diseases

Takeru YAMAMOTO

Subspeciality
Infectious diseases, internal medicine

Department name	General Medicine
Medical School	Aichi Medical University
Special Qualifications	Fellow of the Japanese Society of Internal Medicine (FJSIM)
Education & Career	Mar 2007: Graduated from School of Medicine, Aichi Medical University Apr 2007: Junior Resident, Seirei Mikatahara General Hospital Apr 2009: Sinior Resident, Department of General Medicine / Infectious Diseases, Kameda Medical Center Jul 2013: Research Fellow, Department of Infectious Diseaseas, Mount Sinai Beth Israel Aug 2016: Department of General Medicine, Aichi Medical University Hospital Sep 2019: Fellowship, Department of Infectious Diseases, University of Missouri-Kansas City Jan 2022: Joined Kameda Medical Center as Staff Physician, Department of Infectious Diseaseas Apr 2022: Assistant Chief, Department of Infectious Diseaseas Jun 2023: Assistant Chief, Department of Infectious Diseaseas