Originally Posted by
Flyer123456789
Is the terminal to terminal shuttle in Narita open to all transit passengers
Yes. The landside shuttles are open to any person. (Even if you're a plane spotter, with no intention of flying, you can ride the landside bus between terminals).
Originally Posted by
Flyer123456789
Also, do you have to tow your check in luggage with you in the shuttle and recheck it at the terminal 2
I think that domestic transfer passengers have to carry all luggage to the relevant domestic check-in counters ... which in your case, means JAL domestic counters at T2. I think the bus has two drop off points at T2, so you can choose the one closest to the domestic check-in, to minimize the walking distance.