People talking about what the Wii U "needs"... it hasn't been out for 2 months. It's pretty early to be calling for a huge price cut. It's not selling as badly as the Vita was (or is), and that still hasn't gotten any kind of price cut. Let's see how the Wii U is selling after it has some actual game releases outside of its launch line-up. We don't even know anything about its Holiday 2013 line-up.
Japanese sales are particularly irrelevant for Wii U. This past home console generation, Japan was a smaller market than the "rest of the world" according to VGChartz. Even for the Wii, Japan represented less than 10% of hardware sales. America and Europe are MUCH more important for home consoles, so that's where the Wii U has to sell well. It's gotta get its act together in Europe, but again, that might just be a matter of a few big releases like LEGO City and Wii Fit U.