Weekly sales numbers being discussed over at Gamasutra include the new entry to the Call of Duty series, however this entry paints a well-known picture of the industry’s differences from continent to continent.
While the Xbox 360 version of Call of Duty is the highest selling in the United States, Modern Warfare 3 ranked in with over 210,000 units sold in Japan and the large majority of it was on the Playstation 3. The Xbox 360 version ranks in at 7th place in the Japan sales.
This story originally floated up from a NeoGAF forum referring to data from Media Create. Typically you should probably take numbers like this with a grain of salt, but in many cases there are some who swear by them for indications in trending market movement.