Nishishinjuku Satellite Clinic is a medical clinic located at 6-6-2 Nishishinjuku, Shinjuku Ward, on the first basement floor of Shinjuku International Building. The clinic provides internal medicine and dermatology services and offers English-speaking support. Operating hours are Monday to Wednesday and Friday from 10:30 AM to 1:30 PM and 3:00 PM to 7:00 PM, and Saturday from 9:00 AM to 1:30 PM. The clinic is closed on Thursdays, Saturday afternoons, Sundays, holidays, as well as specific periods such as New Year's, Golden Week, Obon, and year-end holidays. Appointments are required for specific time slots and can be made via web or phone. Payment options include credit cards and electronic payment, and the facility is barrier-free accessible. In dermatology, the clinic has experience treating atopic dermatitis with Dupixent® and alopecia areata with Ritlecitinib®. The clinic also disseminates medical information through its blog, including herbal medicine-related content for internal medicine.