Gun Frontier: Harlock & Tochirou Seishun no Tabi

Gun Frontier: Harlock & Tochirou Seishun no Tabi is set on a wasteland planet and centers on quick-draw Herlock, and his close friend who always wields a samurai sword, Tochirou, as they journey across the land. The story begins when they meet a girl named Sinunora.
(Source: Anime News Network)