Hayashi Clinic, located in front of Okubo Station in Shinjuku Ward, Tokyo, serves as a primary care provider for the community, offering pediatrics, internal medicine, cardiology, and allergy care. They provide specialized treatment for heart diseases and allergies, serving a wide age range from infants to adults. Vaccination services include influenza and HPV vaccines, routine vaccinations for babies and preschool children, as well as optional vaccines available at out-of-pocket cost. Health checkup services are available for both children and adults. The clinic offers specialized outpatient services including pediatric cardiology and pediatric sleep clinics, conducting sleep studies for children. They focus on allergy care, with a particular emphasis on pediatric allergy treatment. Vaccinations and infant health checkups require appointments, while general care can be accessed without reservations by completing the online medical questionnaire in advance. Clinic hours for general care are Monday, Tuesday, Wednesday, and Friday 9:00-13:00 and 14:00-18:00; Saturdays 9:00-13:00 for general care and 14:00-16:00 by appointment. Reception closes 30 minutes before the end of clinic hours. The clinic is closed on Thursdays, Sundays, and holidays. English language and barrier-free accessibility are provided, and the facility is located on the 3rd floor of Hayashi Building.