Media

Numerous books promise vital knowledge of Ninjutsu. The grandmaster himself, Dr. Hatsumi, provides authentic information. Here are links to some of his more recent books:

Hatsumi, Masaaki (2004):
The Way of the Ninja: Secret Techniques
Kodansha, Tokio

Hatsumi, Masaaki (2008):
Unarmed Fighting Techniques of the Samurai
Kodansha, Tokio

Hatsumi, Masaaki (2011):
The Essence of Budo: The Secret Teachings of the Grandmaster
Kodansha, Tokio