Yokoyama Clinic, located in Nakarokugo, Ota Ward, Tokyo, is a medical facility that offers a wide range of treatments centered on internal medicine. In addition to examinations for daily injuries, skin issues, and surgical symptoms, they also accept consultations for heart-related symptoms such as palpitations, shortness of breath, swelling, and dizziness. They handle gastrointestinal diseases and upper gastrointestinal endoscopy, providing careful gastroscopy examinations. In the ophthalmology department, they treat symptoms such as decreased vision, redness, eye itching, dry eye, eye strain, and stye, and also provide allergy treatment including hay fever. Along with general pediatric care, they administer various preventive vaccinations including influenza and pneumococcal vaccines. They conduct health examinations including corporate checkups, pre-employment physicals, school entrance health exams, and Ota Ward specific health checkups. They also offer smoking cessation support through nicotine dependence assessment tests, CPAP treatment for sleep apnea syndrome, and handle nasal stents. In addition to English-speaking support, they provide parking facilities and barrier-free access. Closed days are Thursdays, Sundays, national holidays, as well as the year-end and New Year period from January 1st to 5th and December 28th to 31st.