pocket wifi to make sure anh access được internet anytime any where để xài google search
mi`nh có thể order online, paid in advance. Pick up the device upon your arrival to NRT. There will be a return envelop provided for you to either mail it back or drop it off (desgnated drop off boxes laying around NRT airport)
https://tokyocheapo.com/business/internet/rent-wifi-router-japan/