Visitors at the Tokyo Game Show try UFC Undisputed by Konami.Credit...Yuriko Nakao/Reuters CHIBA, Japan � A supersonic hedgehog and a plumber named Mario may have been unlikely heroes, but they once dominated video games. Only the Japanese could make innovative games like those, developers here used to boast. The West just didn’t get it. Warp ahead 20 years, though, and much of Japan’s game indust