Serge Mol, Classical Weaponry of Japan: Special Weapons and Tactics of the Martial Arts, Kodansha International, (ISBN9784770029416, lire en ligne), p. 17
Fumon Tanaka, Samurai Fighting Arts: the Spirit and the Practice, Kodansha International, (ISBN9784770028983, lire en ligne), p. 12
Thomas Conlan, State of War: The Violent Order of Fourteenth-century Japan, Center for Japanese Studies, University of Michigan, (ISBN9781929280230, lire en ligne), p. 260
Manouchehr Moshtagh Khorasani, The Development of Controversies: From the Early Modern Period to Online Discussion Forums, vol. 91, Peter Lang, coll. « Linguistic Insights », (ISBN9783039117116, lire en ligne), p. 150
Evans Lansing Smith et Nathan Robert Brown, The Complete Idiot's Guide to World Mythology, Penguin, coll. « Complete Idiot's Guides », (ISBN9781592577644, lire en ligne), p. 144
