Did you take the plot of THE SHARP END from Kurosawa’s Yojimbo or from Leone’s A Fistful of Dollars?
No, I took the plot from Red Harvest by Dashiell Hammett, his first novel (a fixup from novellas he’d written for Black Mask magazine in the late 1920s). Kurosawa took Hammett’s plot for his fine Samurai film (I’m told there may have been a Japanese gangster novel as an intermediary, but I haven’t seen it myself), and Leone then turned Kurosawa’s film into the first of his Spaghetti Westerns. I’m familar with (and like) both films, but I read Hammett before I saw them and have reread him often since then. I’m a little surprised to be asked this question so often, because my credit to Hammett in the front of the novel is explicit. Apparently a lot of people expect more originality of the film industry than I do.