If you were planning to import some Wii U games from Japan, think again. The Wii U will be region-locked and to be able to play a Japanese game on a U.S. Wii U, will require the use of a Japanese Wii U, as well.
Nintendo has confirmed to Famitsu that the Wii U will indeed be region-locked. The latest issue of of the magazine quotes Nintendo saying that they have made plans to prevent the Wii U from playing software outside of specified territories. Eurogamer snagged a quote translated on Twitter:
"What can be played on the Wii U is restricted by a region-lock feature; software not sold in the same region cannot be played."