Koyanagi Dental Clinic is a community-based dental practice located along the old National Route 34, approximately 1km from Hizen-Yamaguchi Station toward Saga in Kita-machi, Kishima-gun, Saga Prefecture. The clinic is staffed by a certified prosthodontic specialist — Director Shinsuke Koyanagi holds board certification in prosthodontics, and providing high-quality prosthetic treatment such as dentures and dental bridges is one of the clinic's defining strengths. In addition to general dentistry, the clinic also offers geriatric dental care and visiting dental services, ensuring support for patients who have difficulty traveling to the office. The clinic also fabricates custom sports mouthguards for athletes engaged in combat sports and contact sports, as mouthguards are known to help prevent tooth fractures, jaw fractures, and concussions, meeting the needs of sports enthusiasts. Cosmetic dentistry is available as well, allowing the clinic to address a wide range of patient needs. Appointments are not required, as the clinic operates on a walk-in basis. The facility is equipped to accommodate diverse patients, with English-speaking staff, credit card and electronic payment options, ample parking, and barrier-free accessibility.