Originally posted by King Kandy
Well for one, Orochimaru is notable for his use of Kinjutsu... we've never seen Pein have any such renown.Everyone who has seen Pein has noticed one exceptional thing about him that gives him his power... it wasn't his powerful Kinjutsu, no it was that he possessed the Rinnegan. We don't know him to use Kinjutsu, but we DO know him to use the Rinnegan, so it is far more likely that it was a Rinnegan technique. It's like asking how we know Haku's ice is a Kekkai Genkai and not a Ninjutsu.
What? Most of Pains jutsus were infact, just jutsus, his kuchiyose no jutsu, his demon bijuu extracting jutsu, his clone jutsu, etc they were all just jutsus, and not rinnegan doujutsus. You don't have to be "renown" to use kinjutsu, Gai is not known for kinjutsu, he has one, Naruto isn't, he has one. Rinnegan gave Pain the power to be versatile with all the elements at his disposal, mixed with his genius abilities, is how he came up with the jutsus. But they are just jutsus.