Gun Frontier (ガン フロンティア Gan Furontia) is a 1972 manga by Leiji Matsumoto. It introduces Tochiro Oyama, best friend to Matsumoto's classic hero, Captain Harlock, who is in turn depicted as a gunslinger in the Old West. In sharp contrast to other Matsumoto's stories, Gun Frontier is a comedy adventure rather than a space opera. Also, unlike other Harlock stories, in Gun Frontier, Harlock is depicted as Tochiro's sidekick. Since the original manga, there has been a novel and a 2002 anime adaption of the series.