If you have a few hours to spend at Narita AP, why don't you peek in the local life in the town of Narita and its surrounding area.
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Tours; Go to Tour Listings and More Tours for more details
1. Standard 4-hour tour around Narita (start at 8:00, 10:00, or 13:00)
2. 4-hour Customized tour of your own; start any time
3. Early morning fish market and the temple ritual starting at 5am
4. Tokyo day trip by train or 5. by minivan (night tour is available as well)
6. 5-hour tour of Itako/Sawara, rural towns near Narita
*will be glad to provide tips for arranging tours in Japan