Ryu's Realm Heart was right beneath. Obviously, as he moved through the Real Plane, his Realm Heart likewise moved with him. It wasn't anchored in any one particular spot, so he already had his transportation prepared.
What was odd, though, was that when his real body entered, he formed right in the middle of his Realm Heart. It should have been a place akin to the core of a world, blazing with heat and a whole soup of volatile qis that should have ripped him to pieces in an instant. It was a far cry from that feeling of surfing he had had when he just sent his consciousness in here.
What was odder was that he felt like he was within his own heart, as though his body and his heart had swapped places, and rather than the former enveloping the latter, the reverse had occurred.