Yeah, I've noticed that a lot of things come out of Japanese mythology in this show, and this thing about the sword is pretty neat. What with "orochi" being a mythical 8-headed serpent. So the sword being pulled out of Orochimaru... Pretty darn neat. ^___^ I wonder, though, since you mention Amaterasu in relation to the sword, if that means Itachi learned that technique "Amaterasu" from him.