Ninpo: Wisdom for Life was written by Masaaki Hastumi and was only available in Japanese. Hatsumi-soke (headmaster of the Togakure Ryu Ninpo and Director of the International Bujinkan Hombu (Noda, Japan) encouraged this translation which was widely released in the 1999. This book has appoximately 180 pages of ninja philosophy for training and living. Copyright 1998, 2018. All rights reserved.