All departing travellers must pass through US Transportation Security Administration TSA checkpoints; if you are continuing on to Guam, you need a US Passport, a valid US visa, or to be a citizen of a Visa Waiver Country as the US government controls Guam immigration.
Travellers returning to Japan from the Northern Marianas are not allowed to bring any US beef products including beef jerky due to current trade restrictions; any such products will be confiscated and destroyed by Japanese customs officials.
Countries that maintain a consular presence in the CNMI include Japan (http://www.hagatna.us.emb...), the Philippines (http://www.philippineemba...), and Palau (http://www.visit-palau.co...).
