https://www.abebooks.com/9781897310137/Deadly-Weapons-Koga-Ninja-Yamashiro-1897310137/plp
Deadly Weapons of the Koga Ninja - Yamashiro, Mr. Toshitora: 9781897310137 - AbeBooks
FOUND HERE in this compact but informative book are 50 pages containing some of the most deadly weapons and techniques of Ninjitsu ever recorded in writing....
deadly weaponsof thekoga