Well if Amazon Japan is anything like Amazon in North America then that statement is common for any item not yet released. That is actually one of the more enlightened features of Amazon. Some people do not want a pending charge. That is a valid concern a month or even two months before something becomes available. You might order something for launch and in the time frame forget about it making it a problem if your low on funds at the time they charge you.
Amazon has many great systems in place to help you order in the way that most suits your needs. From super saver, wish lists, focused mailings, personalized selections. The list of tools is huge. This just seems to be one of them. Not doubting they could have sold out, but there is a logical standard explanation for the notification.







