Nippon Ichi Software had a couple of announcements to make for PlayStation Vita in Japan during a 20th anniversary event over the weekend. One of the two titles announced appears to be a Disgaea 4 port called Disgaea 4: Return, and is set for a January 2014 debut in Japan.
Disgaea 4: A Promise Unforgotten was originally released on PlayStation 3 in February 2011. The tale of former tyrant Valvatorez made its way to North America in September of the same year.
The other game announced for Vita is something tentatively titled Criminal Girls Invitation. That one's slated for a winter Japanese release.