Toba

A giant tuning fork created for the purposes of channeling sound ninjutsu and being used as a sword. The weapon is specially designed to take vibrations and channel them into a sharp edge which is then formed around the prongs of the fork. The sharpness created from vibrations is based of the way raiton ninjutsu makes blades sharper, except the sound release variant subtracts the weakness to wind release jutsu. Nonetheless, somehow cancelling the vibrations can render the weapon dull again.