Located in Fujishiro, Kainan City, Wakayama Prefecture, Yamashita Naika is an internal medicine clinic established in 2005. Dr. Tetsuji Yamashita, the director, graduated from Wakayama Medical University and holds certifications from the Japanese Society of Internal Medicine, Japan Gastrointestinal Endoscopy Society, and Japanese Society of Gastroenterology, with extensive experience at university hospitals and regional core hospitals. The clinic offers internal medicine, gastroenterology, respiratory medicine, cardiovascular medicine, and radiology, managing lifestyle diseases as well as respiratory and cardiac conditions. It specializes in gastroenterology, providing upper gastrointestinal endoscopy, colonoscopy, and abdominal ultrasound using advanced equipment. Sedation is available for more comfortable endoscopic procedures, and strict hygiene is maintained with thorough disinfection after each examination. Hours are 9:00 AM–12:00 PM and 4:00–7:00 PM; Thursday and Saturday mornings only; closed Sundays and holidays. Home-visit care and health checkups are available, and English service is offered. The barrier-free facility includes wheelchair-accessible restrooms and parking. The bright waiting room features terrace greenery, creating a calm atmosphere at this community-focused clinic.