I'm actually a Samurai, I have the emperor's dragon blood flowing down my veins...
Hey I came here because I thought this would be an interesting discussion, only to find out that some people are starting to take this seriously. guys, please don't turn Istorya into a watering hole for deluded idiots.
It's kinda hard to discuss this in fairly serious manner since samurai, their code of battle and their lives are fairly well documented (Book of Five Rings, anyone?) while ninjas are practically myth. but that's the whole point of being one with the night, correct? to cleverly hide one's true nature. If I were a ninja and somebody would tell me ninjas exist, i would probably laugh and tell them they have a wild imagination. If ninjas were alive today, I'd imagine them to be like Jason Bourne, cool-headed and very plain.
"I am a shadow, I have no name..."
According to what i've read, ninjas commonly served as spies, messengers and of course, assassins. they were reputed to live among normal folk as monks, fishermen, carpenters, etc. TO be identified as a ninja would have meant death.
Only those who were of royal heritage or Samurai could wear their swords in public, so ninja and their ilk had to make use of unconventional weapons, most preferably those that could be concealed easily.
Their weapons were usually inferior to the katana the samurai class used, so direct confrontation had to be avoided. it was a common tactic to wear the target down with ranged weapons, usually laced with poison, before striking him down in his weakened state.
to be a ninja, you'd have to be very crafty. I personally prefer being a samurai, charging down the fields of Sekigahara on horseback, seeking out the head of Mitsunari Ishida.
Plus, ninjas don't get to own custom made katanas 2000 layers of steel and all.