In addition, the book contains three supplemental sections containing research on Ninjutsu, Yojutsu and accounts of Jujutsu/Judo practitioners dueling with western boxers.
The Ninjutsu section contains numerous articles about Ninjutsu from the late 19th and early 20th Centuries.
There are passages on the Koga Ninja and the Shoninki by Eiji Yoshikawa, as well as numerous others.
The section on Yojutsu reproduces an illustrated story of Tenjiku Tokubei, a famous practitioner of Yojutsu magic.
220 pages.