[MMM]

As far as I know, you can travel for up to 90 days on a tourist visa. I am not sure how Australian dollars translate into yen.

You cannot legally work in Japan without a work visa, and you cannot get a work visa without a sponsor and government approval.

I have a feeling your vision of travels in Japan and what is actually possible have a pretty large chasm in between.

Again, read through these forums a little, as this type of question is regularly addressed, and if you have specific questions feel free to ask.