Board Thread:Naruto Discussions/@comment-25278240-20140808192730/@comment-24531362-20140809140036

No, because that wouldn't be teleportation. The Kage Summit arc showed that time passes the same within Kamuiverse and base Narutoverse. So, if Obito had to move in Kamuiverse to reach a new location in base Narutoverse, it would take the same amount of time as just walking there. It doesn't take that long, implying that he can just open portals from Kamuiverse to base Narutoverse as he wills.