Terai Internal Medicine Clinic, located in Sanyo-Onoda City, Yamaguchi Prefecture, is a medical institution providing highly specialized internal medicine care under Dr. Yoshiko Terai, who holds certifications from the Japanese Society of Internal Medicine, the Japanese Society of Gastroenterology, and the Japan Gastroenterological Endoscopy Society. The clinic offers a wide range of treatments from common illnesses to lifestyle-related conditions such as hypertension, diabetes, and hyperlipidemia. Services include early disease detection, preventive care, health consultations, obesity and menopause examinations, diagnosis and treatment of allergic diseases including bronchial asthma and hay fever, osteoporosis diagnosis and treatment, smoking cessation guidance, sleep apnea syndrome testing and treatment, various health screenings, and Kampo herbal medicine treatments. Using the latest ultra-thin transnasal endoscopes for examinations of the esophagus, stomach, and duodenum, the procedure causes minimal discomfort and allows conversation during the exam. Colonoscopic polyp removal can also be performed on a same-day basis upon consultation. Digital ultrasound diagnostic equipment provides imaging of the liver, gallbladder, pancreas, and kidneys, while state-of-the-art digital chest and abdominal X-ray equipment enables clear image extraction with minimized radiation exposure. Arterial sclerosis diagnosis using blood pressure pulse wave testing devices and lung function testing with spirometers are also available, with accessibility features including English-speaking staff, parking, and barrier-free facilities.