Chushingura

After their lord is tricked into committing ritual suicide, forty-seven samurai warriors await the chance to avenge their master and reclaim their honor.

Chushingura is a 1963 drama action movie directed by Hiroshi Inagaki, starring Toshirô Mifune, Chûsha Ichikawa, Yûzô Kayama. It holds an IMDb rating of 7.5/10 from 2,391 votes and runs 3h 27m.