Okuda Internal Medicine, a clinic specializing in internal medicine, is located on the second floor of a commercial facility in Yokodai, Isogo-ku, Yokohama. In addition to barrier-free facilities, medical services are also provided in English. The clinic offers general internal medicine, as well as treatment for sleep apnea syndrome and hay fever. Rubella antibody testing and vaccinations are available, and residents of Yokohama City are eligible for public funding. Patients can use the parking lot on the second floor of the building and receive a one-hour discount by presenting their parking ticket. Clinic hours are weekday mornings and afternoons, and Sunday mornings; Thursday afternoon schedules vary by month. Closed on Saturday afternoons, Sunday afternoons, and holidays. Those with fever or cold symptoms seeking antigen testing must make an appointment by phone in advance. The director is a medical doctor from Yokohama City University School of Medicine with extensive research experience at Harvard University and Duke University in the U.S., as well as an immunology research institute in Switzerland. The director has published over 300 papers in international academic journals and has participated in clinical trials for DNA vaccines and AIDS vaccines.