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.Originally Posted by iMUSTbeTHEdevil
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.