It isn't in Japan either. The game wasn't really programmed to share any data from one version to another -- the three versions are all entirely separate entities, with their own unique trophy sets and everything.
We've informed Acquire that cross-buy and cross-save are important for American consumers, so I'm sure they'll look into it for future multi-platform releases, but it seems the option just isn't there for this one. We're still hoping maybe they can at least add cross-save to the game via patch or something, but right now, that's basically just a "wouldn't it be nice" scenario.
It definitely does make it harder to choose, though, in its current state, and I'm sorry for any inconvenience that might cause anyone.
-Tom