The Notorious Bored Samurai 7 (1992)

The great merchant of Kaga Daitokuya , had taken control of the domain with his wealth and by holding onto the weakness of Lord Maeda Tsunanori , and was planning to rule over Japan as well. In order to free the lord from evil spirits and monsters, Sawatari Shusui heads towards Kaga Hyakumangoku. On his way, Shusui helps a girl named Oyumi who was about to be bullied by a ronin. Oyumi claims to be the daughter of Daitokuya, but she is actually the daughter of Lord Maeda Tsunanori's concubine. Daitokuya, who had taken control of power by raising Oyumi on behalf of Tsunanori who could not make it public because of his legal wife, was secretly storing weapons and ammunition and was pressuring Tsunanori to sign a letter of rebellion.

Unfortunately the movie The Notorious Bored Samurai 7 is not yet available on HBO Max.