How to get Izanagi No Okami varies with each game. In Persona 4 and Persona 4: Golden, you get Izanagi No Okami by getting the game's true ending where you beat Izanami and then fusing him in new game plus. In Persona Q: Shadow of the Labyrinth and Persona Q2: New Cinema Labyrinth, you evolve him through a special quest involving the Velvet Room Attendants. In Persona 4: Dancing All Night, he's a cameo that comes in during the final boss. Izanagi No Okami is also relegated to a cameo during Yu Narukami's ultimate attack in Persona 4: Arena and Persona 4: Arena Ultimax. In Persona 5: Royal, he's DLC that you need to buy alongside the Persona bundle from the online store.