You might want to add Square Enix to the list.
The RPG juggernaut is porting Crystal Defenders, their Final Fantasy Tactics A2 themed tower defense game, to the PSP according to the USK. Crystal Defenders first appeared on the iPhone. Wii, Xbox 360, and PlayStation 3 versions came at a later date.
Perhaps, PlayStation Minis can be a home for Square Enix’s library of Japan-only cell phone games. Compact titles like ports of Final Fantasy Legend and Secret of Mana, as well as made for mobile games such as Dirge of Cerberus: Final Fantasy VII Lost Episode and Kingdom Hearts Coded would be a good fit for the platform.