<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by tmspa:
I am leaving soon to assist with the federalization in Saipan. I was told that I won't need a passport because Saipan is a US territory. However, does anyone know if I will have any problems without one if I happen to have a layover in Japan?</font>
I am not sure if you will have a problem but you really should get a passport. What would you do if for some reason your flight were delayed or canceled and you had to spend the night in Japan?
http://travel.state.gov/passport_services.html
You can get an expedited passport if you are in a hurry.