Atlus is bringing two "new" PSP games to Japan: Persona and Growlanser. One is a remake, and the other is a port.
Persona is a "complete remake" of the 13 year-old PlayStation game. It has more save points, difficulty options, new cutscenes and the game balance adjustments. It will be out in Japan on April 29th.
The other PSP title from Atlus, Growlanser, is a port of the PlayStation tactical RPG. The PSP port features new characters and new routes along with battle tempo enhancements. The game is scheduled for May 14 in Japan.
Atlus to Announce [PSP Hyper]