The Loyal 47 Ronin
Japan, 1701. A group of samurai become rônin after their lord is forced to commit seppuku for assaulting a court official, who will become the target of a merciless revenge.
Starring Kazuo Hasegawa, Yataro Kurokawa, Michiyo Kogure, Shintarō Katsu, Eitarō Ozawa, Takashi Shimura, Koji Tsuruta, Osamu Takizawa, Ayako Wakao, Machiko Kyō
Watch "The Loyal 47 Ronin" on Roku Channel released in 1958. It's a drama and history movie, and has a rating of 7.3 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.