Located in Shimbashi, Minato City, Tokyo, Hibiya Uchisaiwaicho Clinic is an internal medicine clinic with a track record of over 20,000 cancer immunotherapy cases since opening in 2005. Specializing in cancer immunotherapy that can be used in combination with standard treatments, Clinic Director Dr. Tatsuaki Ishiguro, a medical doctor and certified surgeon of the Japan Surgical Society, formulates treatment plans tailored to each patient's condition and wishes. After graduating from the University of Tokyo School of Medicine and working at the First Surgical Department of the University of Tokyo, Dr. Ishiguro served as a visiting assistant professor at the University of Texas MD Anderson Cancer Center, providing patient-centered care based on this extensive background and achievements. Detailed explanations of treatment methods by physicians and treatment plan proposals based on a thorough understanding of each patient's condition are provided, and when necessary, introductions to specialized medical institutions through established medical networks are also made. The clinic features barrier-free facilities and can provide services in English. The clinic is closed on Saturdays, Sundays, holidays, and year-end and New Year holidays.