Koei Tecmo announced this morning on Twitter that Yoru no Nai Kuni (working title) or Land of No Night is headed westward in early 2016 for PlayStation 4.
Land of No Night is releasing in Japan on October 1, 2015 for PlayStation 4, PlayStation 3, and PlayStation Vita. Koei Tecmo didn’t mention the PS3 or Vita versions in their announcement.
Koei Tecmo acknowledges the concerns about the game’s PlayStation 4-only announcement, so if you’d like to see the game on PlayStation 3 or Vita, your best bet would be to let them know.
Update: after listening to fans, Koei Tecmo stated that they’ve re-proposed the localization of the PlayStation Vita version for the west.