Board Thread:Versus Debates/@comment-30323490-20180122204034/@comment-2043993-20180122210624

Now this would indeed be a very interesting battle, but the battle favours Jiraiya, even without his Sage mode. Extreme durability, ninjutsu mastery, intelligence and sheer determination makes Jiraiya a favorite in this match.

also (not to critize) considering Jiraiya's fame, there's no way Kakuzu hasn't heard of him, and Jiraiya's spy Network would have informed him of a guy like Kakuzu.