Board Thread:Theories and Speculation/@comment-6963368-20150822025635/@comment-26369387-20150822110220

@Matthew100x They could probably beat it too.

Also, this is supposed to be time of piece. Why need for such weapons like Katasuke's device?

True, same could say about ninja, but they at very least can protect civilians and merchants from bandits and like. Katasuke's device would be overkill.