This book discloses the secrets of Hakkoryu Ju- jutsu， which influenced the development of many other Budo RyuhaHakkoryu techniques do not depend on muscular power. By using its sophisticated techniques， one can control another instanta- neously， even without clearly visible movement. Although the name Hakkoryu is very famous among many martial artists， its secrets have never been disclosed to the public until now.At long last， a book has finally been published that reveals its secrets. Many martial artists all over the world have been waiting years for this book.They have many miraculous techniques in Hakkoryu that use the physiological structure of all human beings， such as the mind， senses， and sensation of pain. This book describes its ingeniously conceived technical system so that everyone can master it.