Yotsuya Sanchome Dental, operated by Keiyukai Medical Corporation, is conveniently located just a 1-minute walk from Tokyo Metro Yotsuya-sanchome Station. In December 2025, the clinic relocated to the 2nd floor of the SEN Yotsuya Building in Samoncho, Shinjuku Ward, and began providing care in its new environment. The clinic specializes in orthodontic treatment, with a distinctive approach that emphasizes not only the aesthetic appearance of teeth but also the restoration of functional aspects such as chewing, pronunciation, and breathing. They adopt an approach of proposing the most suitable treatment method from multiple options based on the patient's preferences and symptoms, addressing questions and concerns through careful counseling. The treatment menu is extensive, including orthodontics, ceramic treatment, implants, dentures and bridges, general dentistry, periodontal treatment, oral surgery, and preventive dentistry, providing a system capable of addressing various dental issues from mild to severe. Director Akihiro Maeda states that he constantly asks himself "what constitutes treatment that maximally fulfills the wishes of the patient before me," striving to make accurate diagnoses while listening carefully to patients. Clinic hours are until 7:00 PM on weekdays and Saturdays (until 6:00 PM on Monday, Tuesday, and Saturday afternoons), making it easy to visit after work. Payment methods include credit cards, debit cards, and electronic payments.