I know that one! I was eyeing the successor, 310 XT (?), before deciding to go with the Fenix instead. It was supposed to be for running, nothing else, although I'm using the Fenix as my everyday watch more and more. Since it can show iOS notifications, it's pretty neat that I get my SMS, mails, calls and so on on it, just like the Pebble. Oh well, I'm not entirely dependant on it and I'm eagerly awaiting the arrival of my new family members!
Right, yeah, I've come to think that watches for the most part aren't any cheaper in Japan than in EU or US. Personally I buy my watches from Amazon, unless I really suspect fakes (if it's too good to be true...) in which case I think it's worth paying a little bit more and buy from a serious retailer. Anyway, I hope that Casio comes to US or EU as well.