I haven't heard anyone saying the 360 is doing better than the PS3 in Japan (unless you are talking software wise, which is proven by the numbers in the past couple weeks). Now, what I have heard, is that when the Trusty Bell Bundle releases, there is a chance the 360 will outsell the PS3 in hardware.
Threads of Interest:
The Movie Thread: http://www.vgchartz.com/forum/thread.php?id=6880
The Crow Eating Thread: http://www.vgchartz.com/forum/thread.php?start=0&id=3886
The Betting Thread: http://www.vgchartz.com/forum/thread.php?start=0&id=7104
Custom GIFs Thread: http://www.vgchartz.com/forum/thread.php?id=18963
The Greatest Game Ever Conceived On Any Platform
Tag: "I have tasted Obi-Wan's bitter tears"