Reading the NZTA q&a If a vehicle complies with Japan 05, then it will be considered to meet Euro4 standards... Which were implemented in 2005...
Seems pretty clear cut reading it through 
Hi not being a smart ass but you need to read more than the first 4 words you googled and my actual question from the beginning. from the same page this might give a bit more information,
The Japs Code their emissions on a 2-3 didget system. ANYTHING with a 2 didget Emission code (IE: GH) cannot cannot be imported here...even though in Europe the vehicle might be Euro4 any actually comply UNLESS I prove it is IE by buying the emission cert ex Germany. the process is very hit and miss and i have been lucky ...so far
So going back to my origional question, since you guys are "over there" and im at the other end of the planet,, does someone have a contact or a site where I can send a VIN number and I can be told yes or no that it complies to Euro4?! Cheers boys!