The samurai (侍) were members of the professional warrior class in pre-industrial Japan, who served as retainers to the lords. These men came from warrior families and trained from a young age in military arts through private instruction. Swordsmanship, archery, and horsemanship were the primary martial skills; and often in Japanese history, only samurai had the right to even possess these weapons.  Yasuke was a slave.  Stop telling lies.  There's no way in hell he can become a Samurai!  LOL.