On Tue, 3 Mar 1998, LaShawn M. Taylor wrote:

Ryoga stood there for a long time.  Then, slowly, he sunk to his knees,
still reeling over what he had just seen.  Slowly, he shook his head and
breathed, "This is definately *not* Nerima."

Just one thing to point out.  Urusei Yatsura takes place in Nerima.

Of course it would be completely in character for Ryouga to be in Nerima and
not realize it.