Market research data needed

Hi there,

I am desperately looking for market research data on the Japanese and
European games market. What I would need to know are

- the average age of European Gamers
- the average age of Japanese Gamers
- the gender split (male/female) in EU and JP
- the age-structre of gamers in EU and JP (i.e. 25% of gamers are under 18
yrs, 49% are 18 - 49, 26% are 50+)
- the best selling PC and videogames genre in 2007 in EU and JP

Do you guys have any links to research info that provide some of the needed
information? Would be terrific!

Cheers,

AK