Your thread in the Asia forum drew responses from almost all of the regular posters in this group so you probably already have the best thoughts. For myself, I would take a room in Narita at one of the airport hotels, visit the Narita shrine, do a little shopping on the main drag and get a good night sleep. If I were a younger, party-type guy, I would also stay in Narita but after checking in would catch the first Keisei train into the city, transfer to the subway and head to Shibuya or Shinjuku or maybe Roppongi. Just be sure to get back to Ueno or Nippori in time for the last train back to Narita.

JR