Board Thread:Versus Debates/@comment-28136690-20160519163311/@comment-9782468-20160523005009

So Hagaromo learned in basically the same way as Jiraiya and Naruto and presumably Minato but just for him it isn't considered a form of Sage Mode? They're doing the same thing.

People with curse seals can't mold the nature energy themselves, hence the curse seal. Hagoromo can.