"The Secret Weapon of Jujutsu" is the first book about jujutsu in English, which deals with a complete list of small hand weapons used by Japanese samurai and police officers. This martial arts manual includes a history of weapons and a discussion of hibuki (concealed weapons), improvised weapons, and traditional combat weapons such as: kansashi (a long, pointed metal hairpin worn by men and women), kogai and kozuka (small knives), shoku (fireman's axe), shakuhachi (bamboo flute is a special favorite of monks), yavara (short wooden rod), manriki-gusari (short combat chain), suntetsu (short iron rod), tessen (iron combat fan).