[20MM]

You can find a Garmin nuvi in English for Japan here and it has GARMIN maps, not that non-sense that doesn't even work correctly:

Yokota.freeforums.org - View topic - New Garmin GPS 4.3 and 5 inch with saved FAVORITES loaded!

Take a look at this link which explains why this is the best option when compared to all of the other gps and non-garmin maps:

Yokota.freeforums.org - View topic - ◄♦♦♦♦◙♦♦♦♦► Before you buy any GPS look here! ◄♦♦♦♦◙♦♦♦♦►

http://yokota.freeforums.org/download/file.php?id=195

http://yokota.freeforums.org/download/file.php?id=346

http://yokota.freeforums.org/download/file.php?id=109