Board Thread:Episode Discussions/@comment-25558176-20150709114213/@comment-4912646-20150709232013

Kakashi already used Multiple Shadow Clones back in the Land of Waves as a bluff against Gatō's thugs. From my understanding, it's only a kinjutsu because it evenly divides your chakra into tiny pieces, leaving the user with very little remaining chakra and thus severely weakening them. Even the regular Shadow Clone Technique might be considered a kinjutsu if Madara is to be believed.