Worked for the west when we ripped off Seven Samurai and Yojimbo!
And Yojimbo itself was based on Dashiell Hammett's novel "Red Harvest," with a few scenes from "The Glass Key" thrown in. Kurosawa and his co-writer were big Hammett fans and freely admitted the influence. The fact is, good action-adventure plots are almost invariably adaptable to samurai, western, fantasy and sci-fi and even gangster flicks. There are only so many plots and most were used up by Homer's time.