In regard to the comment about special Samurai wielding two blades being Ninja, you are WRONG. The school of Ninjitsu Do was anathema to the Samurai. Ninjitsu is the Way of Stealth. The Ninja were an ASSASSINS' GUILD in old Japan. As for the Samurai, they all had two swords. A long sword, which they used in combat and which they took off when entering someone's house, and a shorter sword which could also be fought with, but stayed on them no matter what, as the Samurai had the right and duty to be armed at all times. Ninja were considered dishonorable and cowardly by Samurai.