This book is a collection of the life's work and essential teachings of Jigoro Kano, who founded Kodokan Judo in Tokyo in 1882. Kodokan Judo was for Kano the culmination of a lifelong devotion to the jujutsu of the past, which he reorganized along educational lines while taking great care to retain its classical traditions. In doing so, he opened the path from jutsu (skill) to do (way), and broadened the horizons of knowledge until he reached the point at which he began to advocate seiryoku zenyo (maximum efficiency) and jita kyoei (mutual prosperity), which represent the universality and ideal of human existence, and are the core values of judo. Throughout his life, Kano repeatedly emphasized grasping the correct meaning of judo and putting it into practice. That is to say, one must understand that judo is the way by which one can make the best use of one's mental and physical energy, and put that into use for the good of society. Because judo was defined in this way, what had once merely fallen under the category of martial art-a fighting skill used to defend against an attack-became subsumed into an altogether richer, more complex, and universal judo, which in turn evolved into a principle that can be applied across the spectrum of human life. The circumstances surrounding the development of judo are described throughout this book, as are its underlying principles, which the author believes have universal applicability to everyday life. This book will be an invaluable addition to the libraries of all judo practitioners around the world.