Wii U is first console to launch with a game rated for adults only

[zarx]

Lots of games are rated Cero Z in Japan...

23 in fact including Ninja Gaiden II
http://www.mobygames.com/attribute/sheet/attributeId,958/

Not even the first on a Nintedo platform, that honour goes to Grand Theft Auto: Chinatown Wars on DS

 

EDIT: Oh I see they are saying it's the first launch title to be rated Cero Z, well that is a pretty meaningless distinction.