Etsuji Okamoto, MD, MPH, PhD., is a professor at the University of Fukuchiyama, in the Department of Health & Welfare Management. Okamoto earned an MD degree from Kindai University Medical School in 1983 and a Bachelor of Law from Osaka University in 1985. He earned his MPH (Master of Public Health) from UCLA School of Public Health in 1988 and his Ph.D in public health from Osaka University Graduate School of Medicine in 1992. Okamoto worked as a clinical intern at US Naval Hospital Yokosuka in 1985-86, as an assistant professor of Kindai University Medical School from 1992-2001, as Section Chief of Health Care Management at the National Institute of Public Health from 2002-16, and as a professor of health and welfare management at the University of Fukuchiyama from 2016 to the present. Okamoto's research interests are in health economics, health service research, and economic evaluation of health services. Particular interests are in using administrative data such as health insurance claims data for economic analysis of preventive medicine.