Microsoft doesn't view Kinect simply as just some peripheral. It's as important as a console. That's why the company poured millions into launching Kinect. And as expected, Xbox 360 sales saw a spike in Japan.
Xbox 360 sales actually tripled. But that wasn't big enough for the console to overtake the DSi. Or the DSi XL. Or the Wii. Or the PS3. Or the PSP. For the week dating from November 11 to November 21, the Xbox 360 sold 7,083 units in Japan. The previous week, Microsoft only sold 2,149 units.