Board Thread:Naruto Discussions/@comment-10452902-20170520191921/@comment-10452902-20170521000053

I know all this but it's poorly explained just how hard these techniques are to learn. We know the Rasengan is very difficult to learn but that is just one example and practically the only example. We mainly see these techniques after they have been mastered so we don't get a very good idea of difficulty.

And also note that the Wind Release: Rasengan is on a much higher level than that of the Rasengan which means it too would be S ranked however, Wind Release: Rasenshuriken is on a far higher scale which means makes things more confusing if the Wind Release: Rasengan is on the same level as a Wind Release: Rasenshuriken just by being both labeled S and that doesn't make sense.