Tomoaki Kato (加藤 友朗, Katō Tomoaki), M.D., is a noted pioneer in multiple-organ transplantation, pediatric and adult liver transplantation. Kato is Surgical Director of Adult and Pediatric Liver and Intestinal Transplantation at NewYork-Presbyterian Hospital/Columbia University Medical Center and is a professor of surgery at Columbia University College of Physicians and Surgeons. Kato is also known for unique and innovative surgeries for adults and children, including a six-organ transplant; a procedure called APOLT (auxiliary partial orthotopic liver transplantation) that resuscitates a failing liver by attaching a partial donor liver, making immunosuppressant drugs unnecessary; and the first successful human partial bladder transplantation involving the transplant of two kidneys together