Originally Posted by
abmj-jr
I would suggest taking the same shinkansen only as far as Shinagawa station and connecting to the same Narita Express there. Arrive at Shinagawa at 10:03, depart at 10:23. You'd have the same 20 minutes for the change but at a MUCH simpler and easier station to navigate. The Narita Express is the same one you would be catching at Tokyo. You'd just be getting on one station earlier. It then goes through Tokyo on the way to NRT.
HyperDia SearchResult
Absolutely, this works if your NEX is the one coming from points West (e.g. Shinjuku) or South (e.g. Yokohama). If this is the case, this is what the OP should do. Fewer up/down, shorter walk, easier to navigate.
Your Shinkansen ticket will let you get out at Shinagawa, no problem. Only "snag" is that if your NEX tickets originate and Tokyo, you're
in theory liable for the express surcharge between Shinagawa and Tokyo, but the chances of the conductor asking for tickets in the segment are low. If you do get caught, you can pay the surcharge on the train in cash or using a SUICA. If you haven't bought your NEX tickets, you should buy them to originate in Shinagawa.