Ever Heart Odyssey is the name of the game, which is currently in a closed beta over in Japan. Despite the name it appears it has nothing to do with Kingdom Hearts (or Etrian Odyssey, but I'd think that much would be obvious...). The screen shots over at Siliconera show off the character art style which is based off of the avatars from the Square Enix Members community site.
Before you start wondering when this comes out in English, think about how often a Square Enix Cel Phone game comes out here. We got lucky with FF4: The After Years
Source: Siliconera
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