Nintendo diligently guards its brands and characters almost to the point of being stingy. That is partly to blame for the dearth of exciting real-world adventures you can have with Mario and Luigi, Link and Zelda, and Pokemon. In four years' time, however, that might change radically. Japanese media report that Universal Studio Japan, one of only four such theme parks in the world, will be opening a "Nintendo Land" section by 2020. And it won't simply be a building with Nintendo merchandise but something likened to the famous Harry Potter area in the very same complex.