Kouya no Shounen Isamu(1971)

Kouya no Shounen Isamu

Isamu was born under a rough sign – a Japanese father, an American Indian mother, both killed by a group of racist thugs in the old west, and rescued by one of the most wanted men of the era. The son of a samurai and an Indian tracker he could become the most powerful gunslinger in the west – if can only survive one of the roughest childhoods anyone has ever seen…

(Source: Animeraider)