numan

Situation
- 20 year old son is dual citizen USA and Japanese. Currently in the USA but planning to go to Japan for a month to visit sick grandparent.
- Japan is currently restricting US citizens from entry but is not restricted Japanese citizens (although there is a two week self quarantine even for Japanese citizens)
- he always uses the passport for the country he in in for immigration purposes
- We normally book flights using US passport number and show that at flight check in
- BUT have heard that airlines are denying boarding to US citizens on flights to Japan since they know they will be denied entry at immigration in Japan
- He is thinking to book ticket using Japanese passport, but wondering about US rule that states all US citizens must enter and exit the US using their US passport. Since US has no official exit controls and apparently instead relies on the airline check in info for exit control unsure of how this would work
- we asked some airlines and got mostly uncertainty, one (American) stated that we should book using Japanese passport or else he could be flagged and denied boarding. Another (ANA) said he could use either passport but that we should "check with embassy". When we asked which embassy, they said "uhh. maybe both"

Any insight here from anyone please?