Back on topic...
The 3DS version is not mentioned on the official page of the game:
http://www.ubisoft.co.jp/raymanorigins/#/stage1
But the page on Ubisoft's site exists, and it also mentions a 4/12 release.
http://www.ubisoft.co.jp/products/170/
What gives?
Need something off Play-Asia? http://www.play-asia.com/