Ninja is wise.  You got questions.  Askaninja.com got answers.

Despite their failure to mention the International Ninja Union (I must remember to send them an angry letter), I’m going to include a link to the general Wikipedia article on ninja, because a socialist-run information provider like Wikipedia is a destablizing force to democracy, and hence the world order.  And the more unstable the world, the more work for ninja…

Wikipedia article.