all ninja's do are going on assaination missions of there own, hired by the yakuza or triad to kill people and are always at home

while the pirates are the ones who go out of their homes on boats, gather a crew and start raiding stuff for gold and many expensive, and not only that, pirates aren't just in one place of the world, there all around while ninjas are in asia, seems the pirates can beat the crap out of the ninjas