Quote Originally Posted by StillAlive
Maybe this has been discussed in previous threads but perhaps the necklace of the 1st Hokage Naruto wears has something to do with the ability to control the bijuus? Maybe it's like a catalyst to some unique technique or something like that?
That's actually a good point. They made it a point to point out the necklace when they were talking about him being able to reign in Naruto.