While still dominating the North American market, Microsoft's Xbox 360 console has been in trouble in Japan, with sales of only 6000 in the past one months. According to Japan's famous game magazine statistics, from May 12 to June 12, the Xbox 360 in Japan sales of only 6000 units, so far in Japan's total sales of only 1.47 million units. Meanwhile, sales of the Xbox 360 in Japan have fallen into a slump. "The Phantom Breaker" was the best-selling Xbox 360 game of the period, but only 13,300 sales. The second is the 7,220 copies of the true Red Knife (Akai katana Shin) and 5,240 copies of Portal 2 (Portal 2). Sales of the Xbox 360 in North America in May this year continued to surpass Sony PlayStation 3 and Nintendo's Wii rivals, up to 270,000, according to data from the US market research firm NPD. The Xbox 360 dominance of the North American market has lasted for 11 months, according to NPD data. Microsoft said that the increase in the Xbox 360 sales was due to the Kinect, a body-sensing gaming device, and that it even extended the Xbox 360 lifecycle. After Nintendo released a new generation of Wii U, it was rumored that Microsoft would launch its Xbox 720 game machine ahead of schedule.