[Hebrews 11:6]

Thanks. My understanding is that Australia’s population largely resides in the south, which seemingly would have made it all the more difficult for Japan to extend its reach that far, especially when it had so many other fronts ongoing and occupying its attention and resources.

[colorado tanker]

An invasion would not have been practical. Australia's population is small, but it is spread out over a huge country. And you're right, most of the population is in the south.

After Coral Sea and Midway the IJN didn't have the capability to take on an operation that massive.

Still, the Australians were really fearful when the Japanese took Malaya and Singapore - and much of their army was in North Africa.