Hasegawa Dental Clinic, located in Hongo, Bunkyo-ku, Tokyo, is a private dental practice with an extraordinary history spanning 109 years since its founding in 1917. Beyond general dentistry, the clinic offers highly specialized departments including a root fracture specialty clinic, an autogenous tooth transplantation specialty clinic, advanced endodontic therapy, a clenching and bruxism specialty clinic, and dental second opinions, accepting many cases considered difficult to treat at other clinics. Guided by the philosophy of being "the last bastion and final hope for patients suffering from dental disease," the clinic is dedicated to carefully addressing dissatisfaction with past treatments and anxiety about future care. Consultations are by appointment only, with evening and holiday hours available upon request, and the extended schedule from 10:00 to 22:00 is one of the clinic's distinctive features. Credit cards, debit cards, and electronic payments are accepted, and parking is available on-site. With a track record that includes publishing a specialized book on tooth fractures, the clinic delivers evidence-based treatment grounded in academic expertise, earning high trust from patients in need of specialized dental care.