Mysterious Clouds: Legend of Satomi's Heroic Deed (1957)

In the first year of Chōroku, Satomi Yoshimi, lord of Takita Castle in Awa, faces defeat by neighboring lord Anzai Kagesuren. As the castle nears collapse, Anzai demands a seed from Yoshimi’s lineage, specifically from his wife, Fushihime. Outraged but facing annihilation, Yoshimi gives Fushihime a string of eight ancestral beads and urges her to escape to loyal retainer Inuda Kobungo. Instead, she goes alone to Anzai, followed by her dog, Hachibo. In a twist, Hachibo attacks and kills Anzai, allowing Fushihime to escape. She later reveals that the beads protected her and predicts that eight warriors bearing these beads will someday defend the Satomi family before passing away. Yoshimi finds one of the beads in Inuzuka Nobuno’s armor and convinces her to serve him. Meanwhile, Baka Daiki, plotting to overthrow Satomi, imprisons Inukawa Shosuke, who tries to intervene, under the watch of vassal Aminen Saomojiro.

Unfortunately the movie Mysterious Clouds: Legend of Satomi's Heroic Deed is not yet available on HBO Max.