Chakra Flow

refers to any technique that increases the potency of a weapon by flowing chakra through it. Usually, elemental chakra is used to flow through bladed weapons to increase the sharpness dramatically. Wind chakra is usually used to increase sharpness, but lightning also provides vibration that can produce the same effect, with the addition of inducing numbness. Another meaning of chakra flow is flowing the chakra through one's body, such as A's Lightning Release Armor, to increase close-quarter combat offense and defense.

Asuma Sarutobi carried special Chakra Blades that absorbed chakra easier to create unique effects, which later fell into the possession of his student, Shikamaru Nara. He also taught Naruto Uzumaki the basics of this technique.

Trivia

 * Although the use of chakra flow techniques have been seen through-out the series, the actual term, 'Chakra Flow', was first used by Karin in the Invasion of Pain Arc, when she observed the use of chakra flow by the Killer Bee.
 * During his final battle with Itachi Uchiha, Sasuke infused a Fūma Shuriken with lightning chakra to increase its sharpness.
 * The Samurai are particularly skilled with infusing chakra to their sabers as they are capable of forming different weapon types by changing the shape of their chakra.
 * Although Darui and Omoi have yet to show any named techniques that involves chakra flow, Darui has infused his Cleaver Sword with lightning chakra to immobilize Suigetsu Hōzuki, as well as thrown a lightning-infused shuriken to break a katana that Kisame Hoshigaki was holding. Omoi has channeled lightning chakra through his sword to diffuse Deidara's Exploding Clay.
 * In his battle against Sasuke, Danzō exhales wind chakra onto a kunai which expands into a sharp blade shaped like a scimitar.
 * The dual swords Kiba, wielded by Ameyuri Ringo and Raiga Kurosuki, are imbued with lightning to make them the sharpest swords ever forged; whether this is by default or provided by the user's chakra is unknown.
 * When surrounded by multiple White Zetsus, Atsui infused his blade with fire and slashed in large circular arcs, incinerating the White Zetsus around him.
 * In the anime, a ninja cat was able to use chakra flow through his claws to deflect weapons.