`Hail Technique

Torrential Technique or Gōu no jutsu literally meaning the latter Torrential Technique is a hidden justu style of advanced water techniques employed by the Hayase clan, generally achieved by rapidly rotating torrents of water like a drill capible of tearing or blasting through most materials.

Torrential Technique can be enhanced with other affinities too such as Sora Hayase's Charged water jet technique, it can also be enhanced with wind assisting the water rotation with wind chakra makes it more powerful.

Creation
Rekkusu Hayase created this technique to enhance general water style as his techniques lacked power he discovered rapid rotation of water will make it tougher and offer more power swell as being an all-round versatile technique.

Training of the technique other than actually using it entails meditating in the presence of rushing water while enthusing large amounts of chakra, it's a very physically and mentally demanding style of training.