Board Thread:Naruto Discussions/@comment-43638386-20190828024709

We know that sage mode is one of the few abilities in Naruto that has nothing to do with the Ōtsutsuki Clan since it was the Toads who taught Hagoromo (although I think that was in the anime so it may not be canon), we also know that Ryūchi Cave and Mount Myōboku are the two places KNOWN to teach it. In my personal opinion I think most animal summons must know about sage mode. It would make no sense if Sage mode is another thing only for the already overpowered Konoha. We only know about Mount Myōboku and Ryūchi Cave because the series are centered around konoha and toads and snakes are the summons of the main characters but the other summons must also have their own places. Hanzo's Salamander, the sharks of the great Kisame, Temari's weasel and many others must each have their own leadership, secrets and techniques.  