Originally Posted by
Loran
I'm going to have an 8 hour layover at NRT next month, roughly 9 am to 5pm.
Your post was a bit unclear to me, but I know there is a "day room" that you can book within the airport (at 4,600 yen - about $38US). I've never used it, but here's a link to it:
http://www.apo-resthouse.com/english/