Board Thread:Naruto Discussions/@comment-24577388-20150224012723/@comment-3568954-20150423135330

GreatestSin wrote: Actionmanrandell wrote: massive amount of chakra just means it causes the user to expend lots of chakra for instance when kakashi used the sharingan back in the day it used lots of his chakra and caused him to be bed ridden for weeks with excessive use. the same with susanoo. Excessive use of susanoo caused the user to use up massive amounts of their chakra reserves itachi never was one with a large chakra reserve. being equal to kakashi in chakra reserves and having the same stamina. but this still means he needed to have the "needed amount" of chakra for susanoo... someone with low chakra-reserves wouldnt even be able to use susanoo ^_^

No. what it says in the Naruto that Susanoo simply uses a massive amount of the users chakra reserves lets say a person had chakra that weighed 20 lbs and a technique used up 19 pounds of said reserve That would be a massive amount of said chakra reserve. it never once says it requires massive amounts of chakra in a general sense. Simply it causes the uchiha to use up Massive amounts of there own chakra. if that was the case then Kakashi would not have been able to use susanoo because he never had massive amounts of chakra, and no its not because of obito entering him. Obito only gave him a small amount of chakra. enough to allow him to use both sharingan the susanoo on the other hand was made of kakashi's chakra being that it had the same scar as kakashi plus susanoo always was the casters chakra in the form of a guardian deity