If you are going any Mac in Japan, the English keyboard is not available on hand. The ones at the store are only available with the Japanese keyboard. If you want one with an American English keyboard or British, you will need to customize it online on the official apple store website. Other wise Japanese keyboard is ok since you can change it to English on the settings but, I find that some don't like it because of the layout and or characters and signs crammed in to the keys.
As of now, if you want to pick it up at the store after purchasing it online with the America English keyboard (BTO), pick up is available on March 10.
