Board Thread:Naruto Discussions/@comment-3571355-20150819100444/@comment-5936871-20150824194518

LegionZero wrote: Madara recognised Amatarasu, so someone other than Sasuke and Itachi had it at a certain point in time. Perhaps trying to copy other MS/Rinnegan techniques is just harder. That was most likely Izuna who had Amaterasu, considering Tobirama knew what it was too.