Ran

In Medieval Japan, an elderly warlord retires, handing over his empire to his three sons. However, he vastly underestimates how the new-found power will corrupt them and cause them to turn on each other...and him.

Ran is a 1985 drama war movie directed by Akira Kurosawa, starring Akira Terao, Tatsuya Nakadai, Jinpachi Nezu. It holds an IMDb rating of 8.2/10 from 152,408 votes and runs 2h 40m.