Well, there is Samurai 7 loosely based on Seven Samurai... ( plotwise it's based on it, it just mixes in some cyborgs ;) )
which isn't available on CR for me in my region so probably not for you either.
P.S.: Did you check Basilisk, of which the second series is airing this season? It's set against the backdrop of Tokugawa Ieyasu's death (i.e. the succession after the generation that ended the Sengoku warring states period) with the first anime series set right then in 1614, the second ten years later. Both the manga and anime are rather, uh, seinen in my opinion.