Board Thread:Boruto Discussions/@comment-31700161-20170610121821/@comment-30323490-20170610135456

The idea of the 3 great dojutsu also goes back to Kaguya since these dojutsu came from her powers directly, and she was the originator of chakra on earth. So there would be a reason why these 3 eyes in particular are regarded as the 3 great dojutsu.Also if i'm not mistaken, i think Jiraiya was the first to mention "the 3 great dojutsu" when they were introducing the rinnegan for the first time.