Eiji Tanaka is a Professor and Chair in the Department of Orthodontics and Dentofacial Orthopedics, Institute of Health Biosciences, Tokushima University Graduate School since 2008. He received a DDS from Osaka University Faculty of Dentistry in 1988, a PhD in Dentistry from Osaka University Graduate School in 1993, and a special clinical license as orthodontic instructor from Japanese Orthodontic Society in 2000. After being an Assistant professor in Hiroshima University, he concentrated research on tissue engineering and biomechanics in dentistry, had more than 180 publications in numerous international journals, subsequently became an Editorial Board in Journal of Biomechanics and Journal of Dental Research, and an Associate Editor in Annals of Biomedical Engineering. His research is centered around biomechanics of the temporomandibular joint (TMJ), application of low-intensity pulsed ultrasound in dental tissue engineering, and development of nucleic acid medicine for treatment of muscle atrophic diseases. Then, the goal of Professor Tanaka’s research is to develop a “good as new” treatment remedy for patients with muscle atrophic diseases and osteoarthritis in the TMJ.