I don't profess to know the shipment schedule of the Wii to Japan. However, it is widely known as to how many systems they produce each month and how many they intend to make by certain deadlines. And Japan's sales have not been significantly lower than what they've been shipped; they've been pretty much selling out of the system on a weekly basis just like America and Europe, if at a slower pace per week than those regions due to the lack of comparative media blitz and compelling pack-in.
That said, the shipments do appear to be selling out consistently enough. They're not in a severe shortage the way the US and Europe are, but they're not exactly taking the sorts of tactics one would expect of a company trying to sell humongous quantities of a product, either.
Sky Render - Sanity is for the weak.
