UPDATE: Note that you still need to use the same PSN account across the different platforms. It’s not possible to transfer save data from one PSN account on another.
Original article:
Localization Producer Sam Mullen has given Project DIVA fans some great news regarding the upcoming release of Hatsune Miku: Project DIVA X in the West. Previously, it had been reported that the “Import Save” feature from Project DIVA F 2nd wouldn’t be present in Project DIVA X. This led fans to assume that it wouldn’t be possible to transfer savegames from the Japanese version to the US(/EU?) one. However, it turns out that this isn’t actually the case. While the import feature is indeed gone, that’s simply because it’s no longer necessary. In fact, Project DIVA X will now use a single Cross Save repository across all platforms and regions the game will be available on. For more details, we copied Sam Mullen’s explanation from NeoGAF here:
Hey guys, Sam Mullen here.
Some of you guys have noted that I had previously mentioned that the “Import Save” feature that was present in Project DIVA F 2nd wasn’t in Project DIVA X’s English version.
For those who aren’t aware, PDF2 had a feature that utilized PSN’s Cross Save Functionality to allow you to transfer your Japanese progress to the English version in a unidirectional way. This was accessible by a nice Import button on the title screen.
For Project DIVA X, however, that import button is gone. Instead, all regions of the game utilize a single Cross Save repository. This means not only can you transfer your JP save data to the EN version, but you can go English back to Japanese as well. It also works across platforms.
So basically, if you own a JP VITA version, and you want the English PS4 version, you can transfer between the versions utilizing Cross Save.
Sorry for the previous misinformation and hope that clears things.
Talking about Hatsune Miku: Project DIVA X: we’ve recently uploaded another comparison video for the game to our Youtube channel. If you’re interested in seeing the difference between the PS Vita and PS4 versions of the game, you can take a look at the video below. Hatsune Miku: Project DIVA X will be released on August 30 for both the PlayStation 4 and PlayStation Vita in the Americas. Sadly, there still hasn’t been an official announcement for a European release. Nonetheless, UK retailer Rice Digital insists that they’re selling the EU version (also confirmed in the Q&A section on that page). While there’s no more information available at the moment, we hope this means a release of a EU version is indeed just a matter of time.