The ninja of Japan apparently came to form as a means of self defense against the tyranny of the Shogun warlords. They would try their best to avoid confrontation and it was only if it were inevitable they would fight and fight to the death. Hence the legendary disappearing acts. Their weapons started out as a very basic form of defense, from anything they could basically get their hands on from around the farm.
The first throwing stars were little more than coins or similar to provide distractions, gunpowder was later employed as a way causing a smoke screen to "disappear" - earlier techniques involved simpler ideas, like throwing sand etc in the opponents' eyes. Even chop sticks were used as basic self defense weapons, but I could hardly see them being of great value as boys ninja Halloween costume ideas.
The mystical presence of the ninja has long captivated popular beliefs in Japan, and later the rest of the world. Ninjas figure predominantly in legend and folklore, and as a result it is often difficult to separate historical facts from myths. Among these capabilities includes invisibility, walking on water, and control over nature. The ninja is also predominant in popular cultural heritage, appearing in many forms of entertainment arenas. Myth or fact? You be the one to decide. Fact: Halloween is approaching fast!By Mathew Osbourne