OK so first this a "Survival Action-RPG" and for what I found out this is developed by System Prisma (or System Prims, I don't know) and is also published by Nippon Ichi in Japan.
Create Laharl or anyone you want for Nippon Ichi's PS3 Dungeon RPG
Labyrinth Tower isn't a Dungeon RPG, Nippon Ichi calls it a Survival Action RPG
Tio (Zero no Kiseki)
Official Japanese site: http://nippon1.jp/consumer/legasista/