I have a similar problem; I could easily obtain the Japanese codes but have been unable to use Japanese codes several times now, so I know it would be a waste of my money. I wish I'd never switched from my JP FFXI account to this new EU FFXIV account. It's already forced me to use a different PSN account to my normal one (which is also JP) and now I feel like the only person on my server without a cloud

The mess of the previous EU campaign really punished people who travel.