What I'm saying is, shuriken are throwing knives. I've seen people practice with throwing knives; they are deadly things. Maybe not as deadly as a hail of bullets, but deadly nonetheless. And while I admit that it's tricky to provide exact and precise evidence that ninjas use shuriken, besides actually asking one of them, which I do not have the capacity to do, I don't understand why you seem so dead-set against the notion. I mean, they are the ONLY people who are EVER depicted using shuriken, in fiction, in movies, in anything! It's a fair bet that Samurai didn't use them - Samurai fought with swords, and were far too obsessed with personal honor to even consider using such sneaky and underhanded methods. (In fact, it's precisely the fact that ninjas WERE willing to use sneaky and underhanded methods in a society obsessed with personal honor that made them effective assassins.) Your average Japanese footsoldier was more likely to use arrows, and since throwing shuriken properly IS a technique that requires discipline and practice, as my researches on the 'net have verified, ordinary people would likely not have had the time to learn the skills. Which leaves ninjas, who DID have the time to train - they were trained from a very young age - and had no problems with issues of personal honor or effectiveness upon the battlefield, as the battlefield was not their territory. In short, they're the only group, to my way of thinking, for whom the use of shuriken would make sense. It may not be direct evidence, but I don't think it's flawed logic.