Yes they did.
The invading forces at New Guinea namely Kokoda, were to be used in the invasion of Australia. The Japanese planned to take the northern cities first like Cairns, Darwin, and Townsville and then they planned to take the southern cities of Brisbane, Sydney, and Melbourne.
There was an initial policy of destruction of resources in the North to deny them to an invasion. When it became realised the the Japanese were not going to invade, this ceased.
Well considering the fact that the Japanese bombed Darwin ( capital of the Northern Territory) I believe that they were, otherwise, why bother?
No
The Japanese High Command.
Australia did not invade Afghanistan. Australia was asked to assist in getting rid of a cruel and murderous regime who supported terrorists and terrorism.
The Japanese invaded almost every country in the Pacific Ocean except Australia and New Zealand.
The Japanese never fully invaded America.
During WWII the Japanese wanted to rule the whole world under there banner. To do this they planned on invading the United States of America. They had two routes. The Pacific Islands close to them, and the Aleutian Islands of Alaska. The Philippines were a key staging and launching point for troops and supplies The idea was to take over the islands and work there way down to Australia and use that as a staging point to invade the United States.
The Aboriginal people never did invade Australia, The British people did. Aboriginal people roamed Australia long before the British/white people did. (:
1951
China.
The Japanese Empire