Cooperation jenjei (Earth-2356)

Cooperation jenjei, also called collaboration techniques, is the combination of two or more Force techniques to create a new technique with a strength greater than the sum of its components. This "strength" can be measured in terms of the new technique's range or destructive power.

Obi-Wan Kenobi stated that cooperation jenjei requires synchronization between those whose techniques were being combined. This synchronization can be achieved either through familiarity with each other or simple like-mindedness. For example, because both Anakin Skywalker and Gamatatsu were "simple-minded", they were ideal collaboration partners.

Source

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