The announcement came today over Twitter, which gives the date, platforms (PS4, PS3, Vita) and a link to the game's brand-new English site where you can find out where to preorder it, and not much else. As if I hadn't already!
Today is an almost-auspicious moment to announce the western launch date, because the Japanese launch date is... tomorrow! For the last nine days, Vanillaware's Twitter has been posting its (now-traditional) countdown art.
I'm... actually weirdly hyped to see the final pieces they post.