Updates resolve performance issues and stability bugs found in the initial Japanese launch.
Monster Hunter 4G is the expanded version of Monster Hunter 4 . In the West, this became Monster Hunter 4 Ultimate (MH4U). While nearly identical in content, the Japanese version has key differences: Monster Hunter 4G 3DS -JPN- -Update- CIA
primarily addressed critical bugs and issues with "illegal" Guild Quests that could corrupt save files. Online Connectivity: Updates resolve performance issues and stability bugs found
Updating Your Monster Hunter 4G (JPN) Journey For hunters diving into the Japanese import of Monster Hunter 4G Monster Hunter 4G 3DS -JPN- -Update- CIA