We have to wait until next weekend to play the demo.

http://www.xbox360fanboy.com/2008/05/30/ninja-gaiden-ii-na-demo-by-the-end-of-next-week/

Let us know how the game plays if you in Japan. 

i think the demo was region locked,thats what i read though

smbu2000, our japanese 360 owner has and he says its great. check the ms forums.

Can't wait till next weekend to try it.
and it finally got an A+ rating, from SciFi.com
http://www.scifi.com/sfw/games/sfw18937.html

"As contemporary fighters go, Ninja Gaiden II is peerless."

the only thing reviewers mostly complained about is the camera other than that its an awesome game

I don't think they could have improved the camera much anyway.

I mean, it's a third person view and the camera is bound to get stuck behind doors and stuff. Nothing a quick tap of the R trigger can't fix.

I can't wait for the demo, i'm looking forward to more reviews too, as they have all been quite positive so far.

another review
http://www.joystiq.com/2008/05/31/360-fanboy-shows-us-real-ultimate-power-with-ninja-gaiden-ii-dem/

watch the video - I can't wait for this game.