Hi all, I have a unique situation and was hoping to get some input. My wife is an American citizen who is scheduled to fly from CDG-NRT with a 3 hour layover then on to NRT-NOU. I understand from searches on this forum that airside shuts down at NRT and people cannot remain in the airport overnight.

My questions are as follows:
1) If she misses the flight, due to the earlier legs being late, etc. What happens? (This is a legit concern, as she is flying LAX-CDG, 2 hour layover, then CDG-NRT. Unfortunately, the NRT-NOU is not a daily flight, and appears to occur every other day, at best.) My understanding is that as an American citizen and due to the recent changes, she is not allowed to leave the airport under any circumstance.
2) Is she even allowed to transit through the airport, assuming everything goes according to plan? (I am getting conflicting information, but the NRT website seems to allow the international to international transfer, both are in terminal 1.) I am awaiting a reply from several authorities, but thought I would ask here while I wait.

Thanks everyone, Happy Holidays!