Sei Gastroenterology Clinic, located in Nananae, Tomisato City, Chiba Prefecture, is a medical clinic specializing in Internal Medicine, Gastroenterology, Endoscopic Medicine, Surgery, and Proctology. Leveraging extensive experience from endoscopic specialists, the clinic performs painless gastric and colonoscopic examinations. When colon polyps are discovered during a colonoscopy, same-day polypectomy is available, enabling day-surgery treatment. The clinic is closed on Thursdays, Sundays, and public holidays, and also offers COVID-19 and influenza vaccinations. The facility is equipped with parking and barrier-free accessibility. Payment methods include credit cards and electronic payments, and medical services are available in English.