Professor Junji Tagami was educated at Tokyo Medical and Dental University (TMDU), achieving his DDS in 1980 and his PhD in 1984. He was appointed to the Professor and Chair of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences at Tokyo Medical and Dental University in 1995. He is still responsible to manage the activities of the department. He is a prolific author who has contributed more than 450 papers to peer-reviewed international journals and some 200 papers to Japanese academic journals in the fields of cariology, tooth-colored dental restorative systems, the bonding of materials to dental tissues, and dental education. His background in research on the mechanism and structure of caries is believed to be one of the most important factors orienting adhesion as a means of achieving minimally invasive dentistry. The development of the Optical Coherent Tomography(OCT) for dental diagnosis and application for laboratory material testing is one of his outstanding achievements in recent years. As the chair of Cariology and Operative Dentistry, he has supervised over 150 graduate students and postdoctoral researchers from Japan and around the world in the past 20 years, some of whom have become prominent academicians themselves in Japan, North America, Europe, Asia, South America, and Australia. Because of his contribution in dental research and education, he was awarded Honorary Degrees from King’s College of London and Mahidol University in Thailand, and the distinguished scientist award, Wilmer Souder Award, from IADR.