I stumbled upon these links... interesting. Sorry if posted before... The titles are a little misleading in the links.
http://whatjapanthinks.com/2007/09/29/japanese-kids-prefer-the-nes-to-the-psp/
Interesting tidbits:
34% own 5 or more consoles.
Twice as many play the original NES over the Xbox.
Character nurturing games are the top interest.
And other similar bit of research on the same site:
http://whatjapanthinks.com/2008/06/03/playstation-3-played-less-than-nintendo-64/
Interesting Tidbit:
RPGs are at the top of the food chain illustrating all the angst over SO4, lol