I have aimed at producing a textbook on Judo that will give a sound basic knowledge of the subject. It covers the whole field of Judo in the sense that every kind of technique used is represented by some outstanding examples. The beginner will find that he is being guided by an experienced hand and that he is getting clear and reliable information. The work should also prove invaluable to more advanced students and instructors. Those among the latter who had not the opportunity of learning Judo at its source will find here hints, advice and explanations they may have been unable to find elsewhere. Judo is an art, and only with a clear understanding of its technique and a true insight into its principles can one attain a higher level and greater skill.