Located in Tsurukawa, Machida City, Tokyo, Hamaya Dental Clinic is a dental facility focused on preventive dentistry with the goal of enabling patients to eat deliciously with their own teeth even at 100 years old. The clinic has adopted the Medical Treatment Model (MTM), proposing customized preventive programs for each individual based on examinations and risk assessments. As a characteristic of their treatment system, reserved time is allocated exclusively to each patient, and they employ a system where dentists and assigned hygienists do not treat multiple patients simultaneously. By adopting an assigned hygienist system, they continuously monitor patients' oral conditions to provide effective prevention and maintenance. In terms of facilities, they have fully private care rooms dedicated to prevention, ensure accessibility with barrier-free features and parking availability, and accept credit cards, debit cards, and electronic payments. Additionally, English communication is possible. After saliva tests, a "Dental Health Notebook" is created containing test results and intraoral photos, establishing a system for long-term oral health management.