Watch the introductory chapter of a lecture on autophagy presented by Professor Tamotsu Yoshimori from Osaka University's Graduate School of Frontier Biosciences and Graduate School of Medicine. Delivered at Kyoto University Medical School's Advanced Science Research Building on June 9, 2019, this 10-minute segment introduces the fascinating cellular process of autophagy - a mechanism where cells protect themselves by "self-eating." Part of the Junior Doctor Training Program jointly organized by Osaka University, Kyoto University, Kansai University, and NPO Einstein Intellectual Human Resources Network, this lecture explores how cells maintain their health through this crucial self-degradation process.