Hiro-o Hamaguchi is Professor at Department of Chemistry, School of Science, the University of Tokyo. He received his D. Sc. Degree in physical chemistry 1975 from the University of Tokyo. In 1997, he became Professor at Department of Chemistry, School of Science, the University of Tokyo and has been holding the same position till the present time. He is the author of 230 scientific papers in the field of physical chemistry and molecular spectroscopy. His professional services include associate editor/editorial advisory members of several international journals, chair of several international conferences, President of the Spectroscopical Society of Japan and President of the Japan Society of Medical Spectroscopy. He received Meggers Award (2005), the Spectroscopical Society of Japan Award (2006), Chemical Society of Japan Award (2009) and TRVS Award (2009).