Reduced Earth Technique

The Reduced Earth Technique is a powerful granted by the power of the Rinnegan.

Hagoromo Ōtsutsuki
As the only human to have truly mastered the Rinnegan, Hagoromo no doubt had this ability, though his skills with it are unknown.

Kaguya Ōtsutsuki
When used by Kaguya, this ability allows her to open up portals between the dimensions, which she can then travel through instantaneously. Her proficiency with this technique allowed her to easily catch up with and surprise Naruto Uzumaki and Sasuke Uchiha.

Ryun & Sasuke Uchiha
Upon gaining mastery of his own Rinnegan, acquiring power close to that of Hagoromo's himself, Ryun gained access to this unique Rinnegan technique. Likewise, Sasuke only gained this ability after receiving Hagoromo's power and awakening the Rinnegan in his left eye. Both men were able to preform the technique similarly; by focusing on an area with their Rinnegan and instantaneously appearing in that location. Naruto likens this technique to the Flying Thunder God Technique in that regard. Ryun, a sensor-type, is able to further advance his usage of the technique by teleporting to any chakra signature he is able to perceive.

Ten-Tails
The Ten-Tails is briefly shown using this to instantaneously close the gap between itself, Kurama, and Gyūki.

Influences
The word is a Japanese-language term for various techniques of rapid movement. The characters in the word literally mean "reduced earth". Shukuchi is the Japanese word for the power of teleportation attributed to some sennin and xian. Those possessing this ability were believed to be capable of moving vast distances in a single step. The term is sometimes used to refer to a similar ability in Buddhist belief.