Nippon Ichi started the official Spring Sale with 12 selected PlayStation games from the Japan PSN. You can buy the games with the special prices (only the download versions) until April 2, 2017.
On the list you can find several Disgaea games, the Prinny 1 & 2, Z.H.P. Unlosing Ranger VS Darkdeath Evilman, Phantom Brave and Phantom Kingdom PORTABLE with other games. Just visit the following PSN link and choose: Nippon Ichi PSN Sale Link