Hiroshi Kobayashi received his Ph.D. in Biochemistry from University of Tokyo in 1974. After his postdoctoral training at Colorado University Medical Center, he started to study adaptation strategies of microorganisms to acidic environments at Chiba University in 1978. His research is focused on mammalian cell functions under acidic conditions from 1996 at Graduate School of Pharmaceutical Sciences, Chiba University. He retired in March 2012 and is a professor emeritus at Chiba University after his retirement. He works as an associate editor of International Immunopharmacology published by Elsevier B.V. from 2014.