There are various region tags that appear to be duplicates of each other with no rhyme or reason as to which is used:
USA, Asia/Asia, USA
Asia, Europe/Europe, Asia
Japan, USA/USA, Japan
It would be a good idea to consolidate these together.
Additionally, "Europe, Germany" makes little sense to be a region tag of its own considering only one disc uses it and a "Europe" tag should suffice ("USA, Germany" and "Australia, Germany" also seem like they could probably be consolidated into their Europe counterparts).
Also, what is the use of the "Export" region?