Onsa Ken

Onsa Ken
Onsa Ken (おんさけん, lit. "Tuning Fork Sword") is a double-bladed ninja-to, made of a chakra-conductive material. This specially crafted chakra blade converts chakra into sound energy, allowing a standing wave of sonic pressure to build within its two parallel blades. This sound energy can be used to deliver devastating attacks on objects or people, or it can be projected into a field of sound for debilitating foes (see Resonating Echo Drill).

A secondary function of this sword, is that it can capture the resonant frequency of an object or material by striking its surface. Once so captured, the amplitude of this frequency can be raised to dangerous levels, and upon striking the surface a second time, the wave is ejected from the Onsa Ken and into the object or material. Ordinarily, this causes objects to shatter along their internal fault lines, as they literally shake themselves to pieces. It has a much more gruesome effect on living tissue. Objects with a lattice structure (glass, ice, and crystal), are particularly susceptible to shattering due to resonating sound.