Great suggestions, all. Thank you very much. We had considered Narita as well. And we really aren't interested in being dropped off in the middle of a bunch of shiny skyscrapers. Grittier and local is what we prefer. Sounds like in practicality we would have the morning and lunch in Tokyo and then would need to make our way back to NRT. And it might be nice to see a museum after walking around in the cold, which we're aren't much used to.

Is there enough to see and do in Narita for that much time?

What would be worst case time frame between walking off the train at NRT and being in our terminal after immigration and customs in early afternoon on a weekday? Airline is UA.

Thanks again!