This book presents important topics to all karate practitioner, no matter what style you practice. First of all this book shows the 5 basic principles that any karate man must have present in order to be skillful in any discipline of Budo (Japanese Martial Arts).These five elements are common to all Japanese Martial Arts. The reader will discover through Physics that brute force is not necessary in Karatedo and that speed is the essential element to achieve success in Martial Arts in Katas (forms) or Kumite (sparring). The author of this book with more than 40 years of experience in the art of Karatedo, points out the main mistakes that are made in the practice of this art and give the solutions to correct the majority of these mistakes made by karatecas in the different styles of karatedo. This book will serve as a guide for anyone who practices karatedo.