No need to PM - this is good info for anyone on this forum!
We usually fly into Narita, and stay at the Shinagawa Prince Hotel. It's Western friendly/easy, you can get a bus from the airport where they take care of your luggage (it's about an hour bus ride) and it is literally across the street from the JR Rail/Yamanote Line. From the Yamanote you can get just about everywhere you need to (it's like the beltway!).
Model shops - you can, from the Yamanote, stop off in Akihabara. Hit the "Radio Tower" right outside the train entrance. I have gotten Karls and Leopolds there for $8 a pop. No horse****, Jack? No horse****, Wang.
Also look for "Leonardo" in Akihabara - it's near "Miniature Park" if I am remembering correctly. KILLER multi story out of production kits.
No, you will need to walk a little more for the next place, and it's not in Akihabara, but in Nakano (or Nakano-Sakaue). It's in the "Nakano Broadway" building, and the shop is called "Mandarake". Got 1/12th Tamiya F1 donors for $32 there one time.
HAVE FUN!