[ ooc: Uhhh well Kumagawa is a proven Shounen Jump junkie, but it's never been shown/implied that he follows Monthly Shounen Gangan. He's probably seen FMA books on display at his local bookstore, but I figure he's never bothered reading them. So, no, he wouldn't know Al's canon. Hope that's okay with you. ]

『My, my. You've never heard of 「Dragon Ball」? That's hard to believe! Have you been living under a rock? You must really be a fool, after all. A big old fool!』