Located in Kitabori, Honjo City, Saitama Prefecture, Oka Hospital (Keisui-kai) is a medical facility offering internal medicine and urology. Internal medicine provides morning and afternoon consultations on Mondays, Tuesdays, Wednesdays, Fridays, and Saturdays. The urology outpatient schedule has been expanded since FY2024, with morning consultations on Mondays, Tuesdays, Wednesdays, Fridays, and Saturdays, and afternoon consultations on Mondays, Wednesdays, and Fridays. Surgeries and procedures are conducted on Tuesday afternoons. COVID-19 infection control measures include mandatory mask wearing upon entry, phone notification for fever symptoms, timed door lock restrictions, temperature checks, and protocols for visits and package delivery. English is supported, with credit card and electronic payment options available. The facility is equipped with a parking lot and features barrier-free accessibility.