Force flow (Earth-2356)

Force flow refers to both the flowing of the Force through an object as well as any technique that increases the potency of a weapon by flowing the Force through it. Ordinarily, elemental Force is used to flow through bladed weapons, mostly the Jedi's lightsabers, in order to either, dramatically increase their various pre-existing properties, or to gain additional advantageous effects. Usually, the user must be touching the tool to initiate Force flow but not always as with the Fire Release: Phoenix Sage Flower Nail Crimson technique, and direct contact with the weapon is not necessary to maintain Force flow. Similarly, techniques such as Kakuzu's Earth Release: Earth Spear, Ki-Adi-Mundi and Roshi's Lava Release Force Mode and the Mace Windu's Lightning Release Force Mode were used to increase close-quarter combat offence and defense by flowing the Force directly through the user's body. However, whether through an individual's body or weapon, the exact effects observed are entirely dependent upon the respective nature and amount of the Force used.

Jedi Master Asuma Sarutobi carried a special hinged double-bladed lightsaber that was fabricated from a material that absorbed the Force easier, in order to more effectively create these unique effects, which later fell into the possession of his Padawan, Shikamaru Nara. Asuma also taught Anakin Skywalker the basics of this technique.

Source

 * https://naruto.fandom.com/wiki/Chakra_Flow.