bansama: The Japanese and Western console markets are already separated. They've been separated since their conception; primarily due to language used.
For a basic example of why that's important: it's far cheaper to localise a Japanese game for the West than it is to localise a Western game for Japan. That already gives Sony and Nintendo a huge advantage over anything Activision would attempt to introduce over here.
This is something you can readily see over here. The games sold here primarily consist of those created here, for this market. Sure, there are Western games too, but unless they are tied to a major license, they tend to take the back seat in terms of shelf space and more importantly advertising.
I can think of only 2 Western games that have recently had air space on the TV (specifically for the game, and not as an advertisement for the system). And those two games are the recently released FEAR 2 localisation and Counter Strike Online (and that's only really Western in terms of the license from Valve to create it for the Asian market). This is important as Activision will need to spend a very large amount on advertising to gain the interest of this market; and look at the difficulties that Microsoft have had penetrating the Japanese market.
The simple point is, Activision are in no way important to Japan and pretty much; never will be. Regardless of some idiotic CEO's megolomaniac-like dreams.
You seem to be forgetting World of Warcraft, which is an Activision game. Doesn't anyone in Japan play WoW?
