The book introduces the general nature and purpose of Shin Budo and modern related disciplines such as kendo, judo, karate-do, aikido and lesser known ones. Their connection with classical martial arts is considered. The author draws inspiration from the very source of the cultural traditions of Japanese medieval chivalry, without distorting the essence and spirit of these disciplines. Here the technical and spiritual nature of military principles is present in its entirety and their influence on the political, philosophical views and educational system of modern Japan is revealed, contributing to the understanding of the reasons why traditional martial arts have not become a thing of the past, but live and develop today. For a wide range of people readers.