Matsushita Ryoji Naika, located in Kajiki-cho, Aira City, Kagoshima Prefecture, is an internal medicine clinic that has been serving the local community for approximately 30 years since its establishment in 1996. In addition to general internal medicine with a focus on cardiovascular care, the clinic has a diabetes and endocrinology specialist on staff, offering specialized outpatient services for diabetes and thyroid disorders. For the 2025 fiscal year, diabetes and thyroid specialty clinics are held on Thursday mornings and Saturday mornings. Consultation hours are weekdays from 8:30 AM to 12:00 PM and 2:00 PM to 6:00 PM, with Saturday hours from 8:30 AM to 12:30 PM. The clinic is closed on Saturday afternoons, Sundays, and public holidays, as well as May 3-5, August 13-15, and December 30 to January 3. Diagnostic facilities include X-ray, ultrasound, electrocardiogram (ECG), and 24-hour blood pressure monitoring, with CPAP therapy also available for sleep apnea syndrome. The clinic provides 25 parking spaces for convenient access by car. Barrier-free facilities ensure accessibility for a wide range of patients. English-language service is available. From April 2026, diabetes and thyroid internal medicine services will be further enhanced, and as a local primary care provider, the clinic is committed to treating lifestyle-related diseases.