Koyu Kai Furushigaya Clinic is a clinic located in Furushigaya Honcho, Adachi Ward, Tokyo. It specializes in internal medicine and provides services in English. The clinic is equipped with a parking lot, making it convenient for patients arriving by car. Starting from May 2024, the opening hours for pediatrics on Thursdays and the clinic's closing hours have been changed as part of a review of the medical service system. The clinic places great emphasis on vaccination, and from October 1, 2025, it has started administering influenza and COVID-19 vaccines. Patients can receive vaccinations without an appointment after filling out a preliminary medical questionnaire. Reservations at the reception are required for intranasal vaccines for those aged 2 to 18 years. Additionally, for those wishing to receive the cervical cancer vaccine, the first dose is administered after a detailed explanation by a pediatrician. The clinic also works on infection prevention, and if symptoms such as fever of 7.5°C or higher, cough, or sore throat are present, patients are requested to contact the clinic by phone before entering the facility.