Koyama Naika Shoukakika is an internal medicine clinic located on the 2nd floor of Porta Hisai in Hisaishimmachi, Tsu City, Mie Prefecture, where Dr. Mutsumi Koyama provides medical care. In addition to general internal medicine, the clinic specializes in digestive system conditions including the stomach, intestines, liver, gallbladder, and pancreas, offering comprehensive care for gastrointestinal diseases to local residents. The clinic provides precise diagnostic services such as ultrasound examinations and endoscopy, as well as health check-ups and home visits, delivering comprehensive care from prevention through treatment. A notable feature is that patients with symptoms suggestive of infectious disease, such as fever, are seen regardless of whether they have visited before, allowing for flexible response to sudden illness. Consultations are held in two sessions on weekday mornings and afternoons, with Thursday and Saturday mornings only; the clinic is closed on Sundays and public holidays. English-speaking services are available, making it accessible for those not confident in Japanese. The clinic is equipped with a parking lot and barrier-free facilities, ensuring ease of access for those arriving by car or with physical disabilities. The clinic also actively supports the use of My Number Card health insurance, striving to deliver high-quality medical care.