http://en.wikipedia.org/wiki/3G :
"FOMA, launched by Japan's NTT DoCoMo in 2001, is generally regarded as
the world's first commercial
3G service. However, while based on
W-
CDMA, it is not generally compatible with UMTS (although there are
steps currently under way to remedy the situation)."
Australian
3G is UMTS/W-
CDMA.
While not a "straight" answer, I would put it in the category of
"unlikely".