Prof. Dr. Yoshio Yamaoka, M.D., Ph.D., is a full professor and head of the Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Japan and a professor of medicine (gastroenterology) at the Baylor College of Medicine, Houston, TX, USA. Professor Yamaoka is also the vice president and trustee of Oita University. He received his M.D. and Ph.D. from the Kyoto Prefectural University of Medicine. Professor Yamaoka's research interests include Helicobacter pylori-related gastroduodenal diseases, molecular epidemiology, virulence factors of Helicobacter pylori, antimicrobial resistance, the immunology of gastroduodenal diseases, gastric cancer, and diagnostic approaches for gastroduodenal diseases. He was awarded the Japanese Society for Helicobacter Research's Uehara Award in 1999, 2004, 2014, and 2018 and the Japanese Society for Helicobacter Research's Kobayashi Rokuzo Award in 2005.