N2 Clinic Yotsuya is an internal medicine clinic conveniently located a 1-minute walk from Yotsuya-sanchome Station on the Tokyo Metro Marunouchi Line. The clinic operates on a complete appointment system and also offers remote medical consultations via the online healthcare app CLINICS. Consultations are available on Saturday afternoons only. The clinic is closed on Wednesdays, Sundays, public holidays, and during the year-end and New Year holidays. A distinctive feature of this clinic is the treatment of joint injuries using regenerative medicine. For osteoarthritis and joint pain, the clinic provides stem cell therapy and stem cell supernatant therapy (Stemsapp®), aiming to repair damaged joints and suppress inflammation. The treatment is suitable for patients with medical histories that make surgery difficult, those who do not wish to undergo surgery, and those seeking to repair the underlying causes of pain. Conventional insurance-based treatments are also available, including rest and immobilization, intra-articular injections of hyaluronic acid or steroids, pain medication use, and rehabilitation. In terms of facilities, the clinic accepts credit cards and electronic payments and is fully barrier-free. There is one parking space available by reservation behind the building, but large vehicles are restricted and require prior confirmation. For patients who have difficulty traveling, pickup service is available to the front of the building. English-language support is available.