What is Ninjutsu?

A reprint and translation of Fujita Seiko’s 忍術とは？an extremely rare 1938 book on Ninja and Ninjutsu.
This contains a complete English translation as well as a reprint of the hard-to-find original Japanese text. Fujita Seiko 藤田西湖 (1898 1966) was born in Tokyo, and was taught Koga Ryu Wada-ha Ninjutsu by his grandfather eventually becoming the 14th head of Koga Ryu Ninjutsu. Fujita Seiko published many books about marital arts.