Higashi Shinjuku Dental Clinic, operated by Medical Corporation Shinkai-kai, is located in Shinjuku 7-chome, Shinjuku-ku, Tokyo, and specializes in preventive dentistry. The clinic has been registered with the Ministry of Health, Labour and Welfare as an "Oral Function Management-Enhanced Dental Clinic," enabling patients to receive preventive dental care and fluoride applications monthly under insurance coverage. A distinctive feature of the clinic is its comprehensive infection prevention measures: hypochlorous acid water is supplied throughout the facility's water lines, providing sterilized water to treatment turbines, gargling water, and all piping. Medical instruments undergo autoclave sterilization, and disposable paper cups and aprons are used consistently, reflecting the clinic's strong commitment to hygiene management. Additionally, full-time dental hygienists provide preventive counseling, offering personalized oral health maintenance plans tailored to each patient's lifestyle. The clinic also conducts blood tests and nutritional counseling based on nutritional molecular science, taking a holistic approach that considers overall health beyond just oral care. Operating hours extend until 7:30 PM on weekdays, with Saturday and Sunday appointments available. The clinic accommodates English-speaking patients and accepts credit cards and electronic payments. Furthermore, the clinic contributes to community healthcare through dental check-up visits to local nurseries and home-visit dental services in Shinjuku-ku.