Hirenkyaku

is an advanced Quincy movement technique, allowing the user to move at high speed by riding on the flow of reishi created below their feet. Essentially, it is the Quincy equivalent to the Shinigami's Shunpo, or the Arrancar's Sonído.

Description
To perform this technique, the user gathers spiritual particles under their feet and rides them to the desired location. Uryū Ishida implied that its speed is superior to Shunpo or Sonido, though Mayuri Kurotsuchi's superior speed during their confrontation, suggests that this is just a generalization. Like the air-walking skill displayed by most Arrancar and Shinigami, it can also be used to hover or fly for long distances. Mayuri complimented Uryū on being able to use this technique at such a young age, suggesting that it is difficult to master.

Hirenkyaku enables Quincy to keep up with, and overpower faster opponents depending on the user's skill. The use of this technique aided Uryū as he defeated a seated Shinigami officer, a Números Arrancar, and even a Privaron Espada in combat. However, there is apparently more use for the technique than simply moving quickly.