MT Building 2nd Floor, 2 Chome-1-9 Mita, Meguro City, Tokyo 153-0062
Our Doctors
Born in Chicago, Dr. Hayashi spent most of his childhood in Tokyo attending international schools. He returned to Chicago for college and spent 17 years in the U.S. before moving back to Tokyo in 2021.
Dr. Hayashi is U.S. board-certified in Internal Medicine and has spent his career at large acute care hospitals diagnosing and managing complex medical cases. After moving to Japan, he also practiced at an international clinic, where he gained additional experience in travel medicine. He maintains an active license in the State of Illinois.
Dr. Hayashi was a competitive swimmer growing up, where he learned the importance of perseverance and hard work through early morning workouts and years of dedicated training. He qualified for national-level competitions and held team records in high school and college. Outside of work, he enjoys staying active with his two daughters through swimming, cycling, and skiing.
Hiro L. Hayashi, MD
Medical Director
Education & Clinical Training
Residency Rush University Medical Center (Chicago, IL)
M.D. Rush University Medical College (Chicago, IL)
M.S. Georgetown University (Washington, D.C.)
B.A. The University of Chicago (Chicago, IL)
St. Mary's International School
Clinical Experience
2016 - 2021 Rush University Medical Center
Department of Internal Medicine
2021 - 2022 Kawakita General Hospital
Department of General Medicine
2023 - 2026 Sendagaya International Clinic (Part-time physician)
2022 - 2026 NTT Medical Center Tokyo
Department of International Healthcare & General Medicine
Board Certifications and Licensure
Board-Certified in Internal Medicine (American Board of Internal Medicine)
Licensed in the U.S. (State of Illinois) and Japan
Professional Memberships & Affiliations
American College of Physicians
Society of Hospital Medicine
Japanese Society of Internal Medicine
Japanese Society of Travel Medicine
Matsuhiko Hayashi, MD, Ph.D
Nephrologist
Occupational Physician
Please e-mail info@cedarmedicaltokyo.com for consultations with Dr. Matsuhiko Hayashi
Dr. Matsuhiko Hayashi is a nationally recognized nephrologist and former professor at Keio University Hospital. Throughout his distinguished career, he has authored numerous peer-reviewed publications in nephrology and has presented his research at national and international conferences.
In addition to his academic achievements, Dr. Hayashi has extensive experience as an occupational physician, partnering with employers to promote healthier workplaces and support employee well-being. More recently, he served as Program Director of the Internal Medicine Residency Program at Kawakita General Hospital, where he was responsible for training and mentoring the next generation of physicians.
Education & Clinical Training
Residency Keio University Hospital
M.D. Keio University School of Medicine
Board Certifications and Licensure
Board-Certified in Nephrology, Dialysis Therapy, and General Internal Medicine
Certified Occupational Physician
Professional Memberships & Affiliations
Japanese Society of Nephrology (Honorary Member)
The Japanese Society for Dialysis Therapy
The Japanese Society of Hypertension (Distinguished Member)
Japanese Society of Internal Medicine
Japan Primary Care Association
American Society of Nephrology
Endocrine Society