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The user exhales wind-infused chakra on to a weapon in order to increase its sharpness, range and lethality. For example, the user can infuse a kunai to resemble a makeshift scimitar or infuse shuriken to increase their range and cutting power. In the case of the kunai, wind-natured chakra, which envelopes the weapon, has a distinctive light green colouring.
Trivia[]
In the manga, Danzō only used this technique on a kunai but in the anime he also used it on shuriken to make them widespread lethal fan blades.
In the anime, shortly after the reincarnatedMadara engaged in a one-sided slaughter of the Fourth Division, a Kumo-nin tries to attack him with this technique.