well funny you should mention that.... there's actually a holden dealership in japan selling vz sedans and utes. according to the owner, the japanese public love them. especially the utes?? and he's only sold one 6 cylinder, the rest have been the 5.7l and 6.0l variants. so in response to your question, yes i think they would love it.
by the way, just incase anyone was wondering i drive both a gtr and a commodore so i'm in no way biased towards one or the other.