The Isshin-Ryu system of karate, or the "One Heart Way", was established in 1956 by Master Shimabuku Tatsuo in Okinawa. US Marines stationed there trained with Master Shimabuku and brought it back to the United States. This book is to serve as a resource to help Isshin-Ryu students to better personalize their understanding of this martial art system and to be better able to train others. Not only basics, kata, and sparring are covered, but also the history, philosophy, and culture underlying Isshin-Ryu are addressed.