Lone Wolf and Cub: White Heaven in Hell

Lone Wolf and Cub: White Heaven in Hell is the final entry in a series of six Japanese martial arts films based on the long-running Lone Wolf and Cub manga series about Ogami Ittō, a wandering assassin for hire who is accompanied by his young son, Daigoro. Although this is the last film in the series, it does not end the story or include the conclusion of the series as written in the manga.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.