[Bilgewater]

You can rent mobile phones at narita airport terminal ... 2, I believe. Once you get past immigration and security you will be in this long hallway where you will find a bunch of desks lined up against the far wall next to the exits where you can do everything from get train tickets to rental cars to mobile phones to rent. You might want to go there because they can speak English. Once out of the airport and you can pretty much forget about English for the most part.

Believe me, if you dont speak Japanese you wont want to try renting a mobile phone using Japanese.