Yasuhiro Koga, Male, Date of birth: November ４, 1952, Place of birth: Japan. Nationality: Japanese Present address: Department of Gastroenterology, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan Education: 1973-1978: Faculty of Medicine, Kyushu University Awarded the degree of MD; 1980-1984: Department of Immunology, Medical Institute of Bioregulation, Kyushu University Awarded the degree of PhD in immunobiology Research and professional experience; 1984-1986: Research Assistant at the Department of Immunology, Medical Institute of Bioregulation, Kyushu University working under Professor Kikuo Nomoto on immunobiology; 1986-1988: Postdoctoral Fellow in Ontario Cancer Institute, Toronto, Canada working under Doctor Tak W Mak on molecular biology in the fields of immunology and virology; 1988-1993: Associate Professor at the Department of immunology, Medical Institute of Bioregulation, Kyushu University working with Professor K Nomoto with viral pathogenesis and infection immunology; 1993-2018: Professor and Chairperson, Department of Infectious Disease, Tokai University School of Medicine; 2018-Visiting Professor, Department of Gastroenterology, School of Medicine, Tokai University.