Professor Dr. Takashi Saito, DDS, PhD, is the Chairman of the Division of Clinical Cariology and Endodontology and Director of the Dental Hospital at the Health Sciences University of Hokkaido, Japan. He earned both his DDS and PhD in Dental Science from the same university. Prof. Saito has held academic and research positions in Japan and the United States, including a research associate role at the University of North Carolina at Chapel Hill. His primary research interests include dentin remineralization, adhesive and esthetic dentistry, and tissue engineering in oral rehabilitation. He is a leading figure in Japan’s dental research community, serving as a director and board-certified fellow in multiple national societies, including the Japanese Society of Conservative Dentistry and the Japan Academy of Esthetic Dentistry. He also serves as a Visiting Professor at Taipei Medical University and an adjunct professor at Mahidol University, Thailand.