I just saw that movie, Kill! (1968). Another classic in the Criterion Collection.
In this pitch-black action comedy by Kihachi Okamoto, a pair of down-on-their-luck swordsmen arrive in a dusty, windblown town, where they become involved in a local clan dispute. One, previously a farmer, longs to become a noble samurai. The other, a former samurai haunted by his past, prefers living anonymously with gangsters. But when both men discover the wrongdoings of the nefarious clan leader, they side with a band of rebels who are under siege at a remote mountain cabin. Based on the same source novel as Akira Kurosawa’s Sanjuro, Kill! playfully tweaks samurai film convention, borrowing elements from established chanbara classics and seasoning them with a little Italian western. https://www.criterion.com/films/763-kill
One of the first samurai movies I ever saw was Shogun Assassin (1980), a combination of the first two films in the 1972 Lone Wolf and Cub 6-movie series, using 12 minutes of the first film, Lone Wolf and Cub: Sword of Vengeance (Kozure Ōkami: Kowokashi udekashi tsukamatsuru or Wolf with Child in Tow: Child and Expertise for Rent), and most of Lone Wolf and Cub: Baby Cart at the River Styx (Kozure Ōkami: Sanzu no kawa no ubaguruma or Wolf with Child in Tow: Perambulator of the River of Sanzu). These in turn were based on the long-running 1970s manga series, Lone Wolf and Cub, created by the writer Kazuo Koike and the artist Goseki Kojima.
That got me interested in the original series and in Japanese films in general.
SHOGUN ASSASSIN HD Trailer https://youtu.be/ZxAPEyzcCtU