Originally Posted by
lovely15
You do not need a passport to transit through NRT to GUM (I have friends stationed overseas who've done it during emergency leave), but you'd be crazy not to have one in case something happened and you need to enter Japan.
Incorrect. You are required to have a passport, period. Military people stationed abroad have IDs that can legally substitute for passports on official orders or whatever else. But civilians are required to have passports.