By the time I've responded it will probably be too late. NRT as an airport is rather dull. Narita on the other hand is, from everything I've heard, a nice village / small town to visit. Regrettably, NRT is really out of the way and is design-wise modern but functionally oriented. Enjoy your time at the lounge and plan a longer layover next time to enjoy something of what Japan has to offer.

Oops. I just noticed this. Are you stuck now or will you be stuck? If this is a future trip, try the master of all Narita layover websites. Otherwise do a quick search on NRT or Narita in combination with layover any you will find a multitude of threads on the topic.

Have fun!