Limited editions are all the rage in many different fields, and Google apparently wants to play this game too. So it's preparing a Pixel phone that will be limited to only one market - it's not limited in the number of units available (that we know of), but will only be sold in Japan.What is this mystery device? Google's official X account for Japan has released the teaser image you can see below. And while it doesn't outright say what device this is, we're going to go ahead and assume it's just a colorway for an existing phone, a hue that won't be available elsewhere.Since...