Board Thread:Naruto Discussions/@comment-32617252-20170827195402/@comment-734582-20170902080556

The point was, Sasuke can use Amenotejikara every few seconds/minutes up to about 3 times and it's undeniably a Rinnegan power. When he uses his portal (a number of times, potentially with other abilities), it taxes the MS side of his eye and the cooldown is significantly longer.