Board Thread:Naruto Discussions/@comment-3965545-20160202201023/@comment-142748-20160203223952

QuakingStar wrote: @SuperSaiyaMan That's not what Kakashi said and that is not what happened, that was when he was fighting a 30% chakra clone of Itachi, he noticed that Itachi was not using his Mangekyo or its techs, Itachi then tells Naruto that he currently can't use his Mangekyo(thanks to being a 30% clone). No, Kakashi says that Itachi's Mangekyo takes a lot of chakra and Itachi commends him for pointing it out since he only had faced it once.

And you just proved a point: it takes more than 30% of Itachi's chakra to use ONE Mangekyo Technique. Kind of points he has low stamina.