Otsuka Clinic is located in Yushima, Bunkyo Ward, Tokyo, with excellent accessibility—a 1-minute walk from Yushima Station (Chiyoda Line, Exit 3) and also a 1-minute walk from the Yushima 3-chome bus stop. The clinic was founded in 1926 by the first director, and the third-generation director currently provides medical care. The clinic offers internal medicine, pediatrics, and allergy treatment. The director, who holds specialist qualifications in pediatrics, allergies, and pediatric gastroenterology, sees patients daily. Clinic hours are 9:00 AM to 12:00 PM on Monday, Tuesday, Wednesday, Friday, and Saturday, and 3:00 PM to 6:00 PM on Monday, Tuesday, Wednesday, and Friday. Reception closes 15 minutes before the end of each session. The clinic is closed on Sundays, national holidays, year-end and New Year holidays, Thursday afternoons, and Saturday afternoons. However, the clinic also participates in Bunkyo Ward's nighttime and holiday emergency care rotation to meet community healthcare needs. In terms of facilities, the clinic has one parking space for patients, and paid parking is available nearby. The clinic is barrier-free and provides services in English. Starting in 2025, the clinic introduced one-month infant health checkups and childcare consultations, and online reservations for vaccinations and health checkups are also available.