Shape Transformation

Shape Transformation is changing the shape and movement of chakra, determining the size, range, and purpose of a jutsu. The Rasengan is described as shape manipulation that has been taken "to the highest possible level", as it relies heavily on chakra control, and it does not require the use of Hand Seals. By building up on precepts learned during Tree Climbing Practice and Water Surface Walking Practice chakra control exercises, the Rasengan is chakra that has been rotated and then compressed down into the shape of a sphere.

Shape Transformation is one of two necessary techniques for creating a jutsu, it's counterpart being Nature Transformation. While Shape Transformation changes the shape and movement of chakra, Nature Transformation changes the actual nature of the chakra, altering its properties and characteristics. Because of this, a technique like Rasengan can be turned into Wind Release: Rasengan or Wind Release: Rasenshuriken, because of Wind Release being joined with the movement of chakra. The movement, instead of spiraling, turns into millions of minuscule blades, as seen when used against Kakuzu.