Possibilities of Unknowns

[BananaFob]

That is a good point. I mean if his soul was taken in exchange for sealing the 9 tails then it shouldnt be out there from Oro to use then. And further more, how did the other villages come across this Jutsu if it is soooo secret? Did the 4th tell other Villages about it or did someone tell him? Soo many questions not enough answers! -dg-

Wasn't Orochimaru part of Konoha? Also, he was still a sensei to Yondaime, as like Gai is to Naruto. They must have had some kind of contact or discussion about it, and also, Orochimaru was developing and researching jutsus (with Kabuto?) before he left Konoha, so Orochimaru might have known about it before.

EDIT: Jaysee, that's what I meant. Gai is not actually a teacher to Naruto, but he is still a teacher. Otherwise, I would have used the Kakashi-Naruto example. And yes, I knew that Orochimaru was older than Yondaime.