The Hakkenden: Legend of the Dog Warriors

"The Awa clan faced certain extinction from a rival clan supported by demonic forces during the bloody feudal warfare in Japan. When the family dog returns with the head of the rival warlord but insists on marrying the lord's daughter, their clan's salvation turns into a curse. The eight unborn puppies of this unlawful union, which yields fruit but results in their deaths, grow up to become the eight Dog Warriors, or The Hakkenden. The eight reincarnated souls pursue different paths of vengeance and revenge, but over time they unite as a powerful force embodying the bushido's eight virtues to defeat the demons and save their tribe!"