Navigate to Documents\Euro Truck Simulator 2\profiles .
Often provides a "100% discovered" map, allowing you to see all roads and cities in the Project Katashime region. Project katashime map save game profile 1.43-1.46
Copy the downloaded Project Katashime profile folder into the "profiles" directory. Navigate to Documents\Euro Truck Simulator 2\profiles
If your game is synced to the cloud, you may need to temporarily disable it in the game's profile editor so the local files are recognized. Project katashime map save game profile 1.43-1.46