Shinjuku Tomihisa Cross Clinic, located in Fukimachi, Shinjuku-ku, Tokyo, provides medical care with a focus on internal medicine. A director who is a certified instructor of the Japan Gastroenterological Endoscopy Society performs endoscopic examinations, facilitating the detection of inflammatory and early cancer tumor lesions and the diagnosis of Helicobacter pylori infection. Day polypectomy and other treatments are also performed. In the field of liver diseases, a specialist certified by the Japan Society of Hepatology provides specialized examinations, diagnosis, and treatment, and interferon-free oral medications are offered as the latest treatments for viral hepatitis. The clinic also places emphasis on the treatment of lifestyle-related diseases, addressing hypertension, dyslipidemia, diabetes, and other conditions. For diabetes, a dedicated HbA1c measuring instrument is available, enabling same-day diagnosis. In addition to general internal medicine care for colds, influenza, pneumonia, asthma, etc., the clinic treats digestive system disorders affecting the stomach, intestines, liver, pancreas, gallbladder, and other organs. Detailed observation using an endoscopic system with laser light sources and high-definition, high-resolution monitors aims to facilitate early detection. The clinic provides on-site parking, is barrier-free, and can provide services in English. Closed days are Wednesdays, public holidays, and specific dates such as year-end and New Year holidays.