Dr. Paul Ichiro Terasaki, professor emeritus of surgery and a pioneer in organ-transplant medicine, died on January 25, 2016, in Beverly Hills, California. He was 86 years old. Dr. Terasaki developed the test that became the international standard for tissue typing; it has been used for all kidney, heart, liver, pancreas, lung and bone-marrow donors and recipients for the past 40 years. Dr. Terasaki officially established the UCLA Tissue Typing Laboratory in 1969, directing the laboratory until his retirement in 1999. In 1984, he founded One Lambda with eight of his former students, and the company, which he sold in 2012, continues to play a central role in the advancement of tissue typing. Dr. Terasaki and his wife Hisako were major donors to UCLA. The Terasaki Life Sciences Building and the Paul I. Terasaki Chair in Surgery at the David Geffen School of Medicine at UCLA were named in his honor.