So which of these 'diverse games' were due to japanese support? The only one I see is the FF series, and the rest are all IPs that won't be effected by any attempt MS makes to court Japanese developers.
http://www.videogamecharts.com/page4.html
Sure, that's just US.. but only because I don't have the charts and also because I'm using the assumption that the Asian market itself is irrelevant. Isn't that what you've said? Sales volume isn't relevant directly, it's only relevant in terms of it's ability to attract developers to gain a 'more diverse' game library so the consoles have greater appeal in the markets that really matter... NA and UK/Europe.
A UK/European software sales chart would be interesting to see as well.. to see how many of these wonderfully diverse Asian games had an impact in that market.
Because it sure doesn't look like they had an impact in NA sales.