Kijima Clinic is an internal medicine clinic located in Minami-Azabu, Minato City, Tokyo, established in 2004 with the motto "Comfort and Trust." Specializing in gastrointestinal disorders, particularly endoscopic examinations and treatments, the clinic performed over 14,000 endoscopic procedures in 2024. Patient data is systematically archived, enabling comprehensive review and comparison over time. The clinic encourages patients to visit with the same expectation as visiting the gastroenterology outpatient department of a general hospital. In 2024, they introduced the thinnest and most flexible gastroscope, Olympus's 1200N, enabling high-definition imaging. For gastroscopy, they enhanced anesthesia efficacy by administering throat anesthesia twice and applying spray anesthesia as a final step. Colonoscopy is performed using a "pull" technique rather than a "push" method to shorten the intestinal tract and reduce discomfort. The clinic is committed to post-eradication monitoring of Helicobacter pylori, as well as early detection of esophageal, gastric, and colorectal cancers. They also provide emergency treatment for anisakiasis and offer RSV virus vaccination (out-of-pocket, ¥25,000 per dose). The facility is barrier-free equipped, and medical services are available in English.