So in the coming few weeks I'll be taking a month long trip to Japan. It'll be the first time traveling there for my friends and I so we will not know the roads at all. As such I'm looking for an offline GPS app that has maps/support for Japan. I know google maps would be sufficient but roaming fees for data would absolutely bankrupt me. Mapdryod has offline maps and gps tracking for Japan but unfortunately does not have navigation. Overall I'm just looking for something that is offline but also provides navigation. I know there are quite a few apps out there that do this but I haven't found one that will specifically support Japan. Obviously cheaper is better but I don't really have a problem paying for an app that will meet my needs; provided the app is of sufficient quality. Thanks in advance to anyone who has some info!