Naika Ryumachika Fukuma Clinic, located near the intersection of Rokken Doro and Maruzuka Bypass in Chuo Ward, Hamamatsu City, Shizuoka Prefecture, is an internal medicine clinic specializing in collagen diseases and rheumatic conditions. The clinic offers three departments: Internal Medicine, Rheumatology, and Rehabilitation, providing specialized care for collagen diseases such as systemic lupus erythematosus, Sjogren's syndrome, and scleroderma. Appointments are recommended, with the clinic accepting first-time and same-day bookings, while also allowing walk-ins for urgent cases. The clinic actively supports home medical care, providing regular home visits and house calls for patients who have difficulty traveling to the clinic. Another key feature is the 24-hour contact system for patient support. Additionally, the clinic collaborates with regional core hospitals such as Hamamatsu Medical Center and Seirei Hamamatsu Hospital through an open-bed system, allowing continuous care as an external joint attending physician when hospitalization is required. Second opinion consultations are also available. The facility offers English-language support, has a 12-space parking lot, and is wheelchair accessible.