Yominokuni

This a technique used through Saito's Rinnegan that allows him to access the dimension of darkness, known as the Yominokuni. Within this realm is an endless expanse of darkness and yin natured chakra, allowing people to access its walls the ability to pour forth, pure darkness, and yin energy, Saito described the realm as constantly raining and having a feeling like even being there was corrupting ones spirit, within this ability Saito gained access to the beast known as Akurojin, he first met Akurojin, when he opened the portal to Yominokuni.

Saito has used this ability to travel great distances before, as well as to entrap opponents.