Looks like SEGA Japan has published the game onto US and EU Apple store themselves. I'm guessing SEGA West doesn't even know about this yet, due to lack of acknowledgement.
Yup. A Hatsune Miku game has finally made it overseas. Miku Flick is an iOS game available on iPhone and iPad devices for a hefty (for iOS) $13.99. Published by Sega, Miku Flick comes with several of Hatsune Mikuís most popular songs. I know not a single one of them since Iím not a fan myself, but I do know her popularity is big enough that this is huge news for Miku fans. Who knows? If enough Miku fans buy this game, we may see more of her games arrive in the U.S. and Europe.