Denen Clinic, located in Tsuzuki-ku, Yokohama, Kanagawa Prefecture, is a clinic specializing in internal medicine. It offers English-language services and provides parking and barrier-free access. The clinic places strong emphasis on infection prevention measures, with the director leading all staff in infection control efforts and conducting training sessions twice a year. When highly infectious diseases are suspected, consultations are scheduled separately from general appointments, and operations follow manuals based on standard infection prevention protocols. Since January 2025, consultations for patients with fever or cold symptoms require reservations through the website and are conducted during designated morning and afternoon time slots. The clinic also provides publicly funded COVID-19 vaccinations and antibody testing for hepatitis B and C. It encourages the use of My Number insurance cards and supports various health screenings offered by Yokohama City. The clinic is closed on Thursday afternoons, holidays, year-end and New Year holidays, and the Obon period.