Edo Period set colour Japanese film from late 50’s early 60’s opening with four travellers (two women, two men) on their way to Edo; as one of the women seems rather delicate they rest while the men go to nearby waterfall – one slays the other.  Survivor returns, tells the women he was attacked and rest of the movie further demonstrates the evil, duplicitous nature of the man culminating with widow’s revenge.

Aired on TCM 6-8 months ago when screening influential, Japanese directors.  My recollection is the title is one word and not being Kurosawa but another great of the mid-century.