I'm going to japan soon and I'll be driving many many kilometer around japan. I've been trying many navigators for Android but most of them either dont have japanese map or are simple rubbish

Is there any app worth getting which is somewhat worth? I've tried google maps, but it only gives you the route with a preview, and no navigation (i don't know why as Japan is listed under the navigational maps)

My phone is a Galaxy note 2

My best bet so far was route 66 but i dont know why it's not allowing me to navigate japanese maps. I did donwload the japan map, and the route is caluclated, but it keeps on telling me that one or more waypoints are unavailable

Thnks in advance