I have the PS3 version, but it's only available in Asia and it's called "Red seeds profile" (just like the cover shown on the top left of this site) instead of "Deadly Premonition". I picked up my copy from a Japanese store in Hong Kong. The dialouge is fully English but the captions and text are in Japanese (ironically, the operations manual is also in English). Being a non japanese speaker myself, I would usually serach for guides on youtube that would help me out in situations that requires some reading. But despite the language disadvantage, I'm pretty sure anyone can still understand the story by simply watching all the cutscenes which are again spoken in English.