Written by Natori Masatake in 1681 it describes the espionage strategies of the shinobi from Kishū. Together with the Bansenshukai and Ninpiden it is one of three major extant writings of the ninja. An original copy of the Shōninki is in the State Library of Tokyo.
The first scroll addresses basic skills, such as disguise and concealment, house-breaking and information gathering. The second part deals with defense against enemy spies, human nature, physiognomy, recognizing and eliciting the true intentions of people and laying false trails and clues. The final scroll is concerned with one's own emotional states as well as those of other people.
- Schedler, Claude (2004). Shoninki, Historical secret writing of the Ninja. Norderstedt: Books on Demand GmbH. ISBN 978-3833404146.
- Jon E. Graham, trans. Shoninki: The Secret Teachings of the Ninja; The 17th-Century Manual on the Art of Concealment. With commentaries by Axel Mazuer. Rochester, Vt.–Torono: 2010. ISBN 978-1594773433
- True Path of the Ninja: The Definitive Translation of the Shoninki (An Authentic Ninja Training Manual). Translated by Antony Cummins; Yoshie Minami. Berkeley, Calif.: Tuttle. 2012. ISBN 978-1583944356.