This is the Japan real world map. I tried to make it to look realistic by rendering the terrain. I have added six tribes. Most of the mountains were removed - there was almost no place for the players.
A generally good job... Almost perfect detail-wise, amazing detail on some islands. The huge, enormous problem here is the sheer width the island... It's so skinny! Because of that, there's very little you can do with the map. However, there's a good job with map detail and cliffs, it works well.