Located in Takadanobaba, Shinjuku-ku, Tokyo, Iryo Hojin Shadan Koko-kai Hosoya Dental Clinic provides comprehensive dental care ranging from preventive dentistry to orthodontics and implants. The clinic's fundamental policy emphasizes "thorough and careful treatment," offering not only general cavity and periodontal disease treatments but also diverse options including teeth whitening, laser therapy, and dentures (featuring comfort materials such as soft resin). Notably, the clinic offers Dog Best Cement treatment as an option—a method that preserves teeth without drilling or removing nerves—reflecting their tooth-conserving treatment philosophy. To minimize patient discomfort, the clinic uses electric anesthesia injection devices that deliver anesthesia at a controlled, slow pace. For periodontal treatment, they employ advanced techniques using phase-contrast microscopes (PerioSaver) to identify causative bacteria and implement medical antibacterial approaches. The clinic prioritizes infection control, utilizing autoclaves meeting European Standard EN13060 Class B requirements and commercial air purification systems used in university hospitals. Night-time consultations are available until 8:00 PM on Tuesdays and Thursdays, accommodating patients who have difficulty visiting during weekday hours. The facility is wheelchair-accessible and accepts credit cards and electronic payments.