I couldn’t even manage to find Narita and Haneda airports, even tried to type in Hiragana, no luck. Just read other comments also before you purchase, I was thinking that others exaggerating about negative thoughts but no they were right. And since it is 1.9GB, each and every update will be at that size, keep that in mind, data plan already sucked up. Have a nice day.
Sayanorame about Gogo Navigator - JAPAN