The word Wagyu refers to all Japanese beef cattle ('Wa' means Japanese or japanese-style and 'gyu' means cattle). The dominant black Wagyu strains are Tottori, Tajima, Shimane, and Okayama. Tajima cattle, bred in the Tajima region, were originally chosen and bred for their heavy forequarters because their primary use was to pull carts. They tend to be smaller and less heavily muscled than the Tottori breed. Tottori cattle, because they were used as pack animals for the grain industry of the Tottori region, were selected for their size and strength of topline.