Joh Clinic is a gastroenterology clinic conveniently located just a 1-minute walk from Shin-Yokohama Station in Kohoku Ward, Yokohama City, Kanagawa Prefecture. The clinic provides English services and barrier-free access, specializing in gastroscopy, colonoscopy, hemorrhoid treatment, and constipation consultation. In 2015, the clinic performed approximately 7,400 gastroscopies and 7,000 colonoscopies, representing top-tier numbers within Yokohama City, while also recording 472 hemorrhoid surgeries. The clinic offers "comfortable and painless endoscopic examinations" using light anesthesia with analgesics and sedatives, with a system in place where skilled physicians perform the examinations. Day surgery for hemorrhoids is also performed, reducing postoperative bleeding and pain through improved surgical methods and advances in medication. Clinic hours are 9:00 AM to 12:30 PM and 3:00 PM to 5:30 PM, with the clinic closed on Thursdays, Friday afternoons, Saturday afternoons, Sundays, and holidays.