Full Japanese voice acting for all story cutscenes and battle dialogue.
If you encounter issues with DLC not loading, use the Luma3DS Locale Switcher to set the game's region to Japan, which sometimes fixes compatibility with undubbed files. Portable Play via Emulation (Citra) shin megami tensei iv apocalypse undub 3ds portable
For those playing "portably" on Android or high-powered handheld PCs (like the Steam Deck), the undub patch is compatible with or its successors like Panda3DS . Full Japanese voice acting for all story cutscenes