i think you will find the particular jap models your talking about would have been alot more expensive than local 4 doors of the era if they had been sold here new. More expensive cars always look better than ones that cost half as much.
eg AUS new skyline GTR in 89-90 was 100k when a local Commodore SS Group A was about 50k so Im guessing if you could have brought a GTST new in australia in 95 it would have been more expensive than a similar mid spec commodore.
Also you have to remember australian car import prices are artificially inflated by import tarrifs and the SEVS scheme which protects australian manufacturers like holden and ford from competition from second hand imports by artificially raising the landed complied price, in NZ which has no import tarrifs there is very few holdens or fords on the road and almost all cars are 2nd hand imports from japan. If you could just buy a car in japan and import it to australia with no complience costs, there would be alot less 10-15yo holdens and fords being driven by australians.
Another thing is that import cars in australia are primarily two door sports coupes like Skyline, sylvia, rx7 and supra. There is plenty of cheap jap 4 doors which arent allowed in australia like nissan primeras, mitsibishi lancer GSRs, mazda familias, honda vigor and even toyota altezza which is already sold here as lexus IS