Originally Posted by
billybligh
you can narita express round trip and the tokyo metro system is superb, but there's no elite entry to nrt so keep the 2 hrs buffer before departure. the security/immigration lines can run long. united's lounge at nrt is one of their best. probably due to the high standards set by asian lounges.
this is a guesstimate please check schedules but arrival departure and express train inclusive you have about 2 hours of sightseeing and possibly cheap world class sushi at tsukuji market.
lastly do not count on wifi or cell coverage. japan is proprietary and you'll need a japanese plan in most if not all cases. plan your excursion to the exact details to avoid getting lost and not having your google maps in hand.
All solid advice right there.
If you're leary of traveling all the way to Tokyo for ~2 hours of sightseeing, Narita city is readily accessible from the airport, has some nice walking, places to eat and drink, the Shinsoji temple, etc. and would be a nice way to stretch your legs, so to speak, without the time pressure and lengthy transits. There are cheap buses that run every 90 minutes, local trains to the 2 Narita city stations (and, of course, cabs as well).
I love the ANA C and F lounges near the 50's gates, but 10.5 hours in ANY airport lounge is an awful lot of time. Basically - that's the same amount of time you'll be in the air to ORD.