- Director, Hinohara Memorial Clinic
- Chair, Board of Directors, Life Planning Center
- President, Board of Directors, International Health Evaluation and Promotion Association (IHEPA)
- Director, Research and Development, Pacific Health Research and Education Institute
- Past Board member of the Association of Independent Research Institutes (AIRI) and the East West Center Association
- Vice President, International Health Evaluation and Promotion Association (IHEPA)
- Vice President, Japan Society of Health Evaluation and Promotion
- Chief Professor, Clinical Health Science, School of Medicine, Tokai University
- Senior Executive Director, Tokai University Tokyo Hospital
- Professor, Institute for Biogenesis Research, Department of Anatomy, Biochemistry and Physiology, John A. Burns School of Medicine, University of Hawaii
- Professor and Director, Department of Geriatric Medicine, John A. Burns School of Medicine, University of Hawaii, the Kuakini Medical Center (KMC) Campus.
- Principal Investigator and Director, the NIH-funded Center of Biomedical Research Excellence for Translational Research on Aging
- Principal Investigator of the NIH-funded Hawaii Lifespan Study and Hawaii Healthspan Study, and co-Principal Investigator of the Okinawa Centenarian Study.
- Physician Leader, the Long Term Care Hospitalist Service at The Queens Medical Center, Honolulu
- President, The Japan Society of Health Evaluation and Promotion
- Director, Department of Blood Coagulation Diseases, Ogikubo Hospital, Tokyo
- Concurrent Professor and Professor Emeritus, Tokyo Medical University
- Program Officer, Infectious Disease, Japan Agency for Medical Research and Development
- Director and past Vice president, International Health Evaluation and Promotion Association (IHEPA)
- Vice president, Shinakasaka Clinic
- Director, Center for Preventive Medicine, Shinakasaka Clinic
- Advisor of the President Office, Sun Yat-Sen Cancer Center
- Professor Emeritus, Tokai Univ School of Medicine
- Professor and Chairman of Neurology, Tokai University
- Past President, Japan Stroke Society
- Past Director, KKR Tachikawa Hospital
- Past President, Japan Society of Ningen Dock
- Administration Director, IRYOHOUJI EISYOUKAI.
- President, NAGAMINE Orthopedic Clinic
- Professor, School of Medicine, College of Medicine, China Medical University.
- Director, Department of Social Medicine, School of Medicine, China Medical University.
- Director, Department of Family Medicine, China Medical University Hospital.
- Vice Superintendent of the National Taiwan University Hospital Hsin-Chu Branch.
- Professor of Department of Family Medicine, College of Medicine, National Taiwan University, Taiwan.
- Attending physician in the Department of Family Medicine, National Taiwan University Hospital, Taipei, Taiwan.