Are you looking for rentable Pocket WiFi at Narita Airport?
In order to look up directions, train times, and also keep in contact with friends and family, you are going to want to be connected to the internet as soon as you arrive in Japan.
Narita Airport offers free WiFi, but only inside the building. Options for free WiFi outside the building are few and far between.
This is why it is important for you to get your hands on WiFi at Narita Airport. If you secure WiFi from the getgo, you will be prepared to go outside and explore the rest of Japan.