Originally Posted by PCheng

I have a trip to Taipei this December. The flight includes a 2.5 hour layover in NRT, flying in on AA, and connecting on JAA airways. How much time should I budget for the transfer? I am asking this question because I have a United RCC coupon expiring soon, and I plan to use it at NRT if I can get at least a couple hour's use of the facility.
I have to catch the shuttle between terminal 1 and 2, since AA and JAA operate out of different buildings. Can someone shed some light on how freuently the shuttle runs, how long the ride takes, do I have to clear security checks when I move between terminals?