The "sangokushi" films beginning with Jirocho sangokkushi: Nagurikomi kojinyama (Jirocho's Tale of Three Provinces, 1952) were based on a novel by Genzo Murakami (1910-2006), who had films based on other of his books on Musashi Miyamoto's adversary Sasaki Kojiro, as well as the wandering shogun Mito-kimon, & others.