 The book gives a brief history of Jujutsu in Japan, and gives the lineage of Judo, referencing Jujutsu masters prior to Jigoro Kano.To show the early origins and continuous development
of the martial arts in Japan, a long list of historical text sources, people, and schools and styles are mentioned.In the book, Kyuzo Mifune explains his metaphysical view of Judo, its role in Japanese society (and the world), and benefits to the individual player.