Wii U Is Region Locked
Nintendo has confirmed that the Wii U console will be region locked. Therefore you will be unable to import video games.
This isn’t too surprising since the Wii and 3DS are also region locked. Famitsu confirmed this on the latest issue posting the following: “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.”
You may want to think twice if you want to import a Japanese Wii U console or video game if you live elsewhere.