Two questions here.
1) Should I buy this game?
2) Is the amount of required reading in the game prohibitive to the level where I wouldn't be able to play a Japanese version of the game? (Zhen, I expect you can answer this question?)
The English release of the game in Australia is on the 28th, the day before I expect I'll have my Japanese copy of Diamond. Given how much I'll be playing that, I've been holding off purchasing anything else for now, but...it's still tempting.