Title The Essence of Ninjutsu
Author None ?
Publication Year 1925(87 years ago)
This is an extremely rare Ninjutsu book.It was published in 1925(87 years ago).The older the book on Ninjutsu are,the more attractive infomation they include.
I am not sure who wrote this book.This book deals with Ninjutsu and Kiaijutsu.The books published in the early Showa period or in theTaisho period often deals with not only Ninjutsu but also Kiaijutsu.Ninjutsu has something to do with Kiaijutsu in many respects.