Board Thread:Naruto Discussions/@comment-35448581-20150520162940/@comment-2013124-20150523035632

Why do you believe it wasn't general knowledge? The kind of thing easily accessible from books? You've seen Neji's team use transciever radios. You've also seen them project video images. Moreover who knows what the byakugan sees? It's supposed to have the greatest perception of the great eye techniques.