Early-Bird Cameo: In Project Diva on PSP, Hello Planet has a mini-game version based on the non-extend music video. This mini-game can unlock a second, alternative ending for the music video it's based on. As of the end of 2014, it has not appeared in Project Diva F 2nd.
Finally ended with Miku Flick and Project DIVA F, both versions, although the PSP and first 3DS game remain Japan-only. DIVA Arcade is available outside of Asia in select arcades (specifically, some of Round 1's U.S. branches).
Project DIVA f for the PS Vita was later localized as well. However, both English ports of Project DIVA F and Project Diva f are missing PoPiPo completely.
Just a day before Project Diva f 2nd was released in Japan, SEGA announced a physical release of the game in both North America and Europe. Unlike Project Diva f, Both the Japanese AND English versions are being released in parallel to each other, rather than staggered.
Basically, every Japanese DLC packs that haven't been announced for the Western yet before then. Be glad that they're localizing them all within 6 months, just not always same week as Japan.
In an inverse, a pre-order DLC packs for F 2nd not included in any of the current Japanese DLC packs are the Americana module for America and Europe versions, and the China module for China version.
Averted as of February 2015, where all foreign pre-order DLC costumes were added to Project Diva F 2nd in Japan.
Project Mirai 2 has also been announced for American and European release in 2015, under the name Hatsune Miku: Project Mirai DX
The depressing thing being here that Phantasy Star Online 2 was known to have a english translation in 2012. SEGA apparently cancelled it due to the same cash shop issues that killed Phantasy Star Universe on XBOX 360.
Recursive Adaptation: The video for "Black★Rock Shooter" appears primarily inspired by the anime Black★Rock Shooter than the original PV itself (down to BRS's signature blue flame in her left eye and Black Rock Shooter's cameo), as well as the song being the version from the 2012 anime rather than the original. So it winds up being that Project DIVA F channeled the Black★Rock Shooter anime, which channeled the OVA, which channeled the original song.