Thanks Bugs. You've been very helpful. Yes, Asahi (朝日) uses "karachuchi" (辛口) on its labels, another term that I don't really understand. To my basic knowledge of the Japanese language, "karakuchi" means spicy taste, but apparently Asahi uses it to mean "super dry" and I haven't even figure out what that means. LOL!
Actually, I've spoken to some Japanese friends before. None of them seems to be sure or consistently certain. The closest reasonably believeable reply was that, it means as natural as possible in the brewing process. The next closest reasonably acceptable reply was like, it's something that makes you enjoy the taste of your beer without getting drunk faster.