well like I said in my post if you are not currently living in japan then that's a shitload of effort to go to. moving countries for 12months... ok, let's say you find someone to do it for you (and this assumes nothing goes wrong and they don't drive or fk up the car).
$90,000 AUD for car
$5,000 for person to do all this work for you and look after it (at least)
$4,000 1 years parking space lease
$3,000 1 years rego in japan
$2,500 shiping
$9,000 GST
$9,900 import duty
$7,000 luxury car tax
now bear in mind you've been without $100,000 for 12months, and when you get the car it's 12 months old. even at conservative investment you could have earnt $10,000 on that money in the 12 months and you would be getting a brand new car. and the car would have warranty. I'm not saying don't do it, if you want to then go ahead. but it's only really viable if you are living in japan. if you aren't then you will need to look at things pretty carefully. All those figures are just off the top of my head but not too far out. as i said in my original post, if you live in japan sure it's viable. if you live in australia is cheaper and easier to buy one here than to do a personal import. unless you buy a personal import from someone in japan who has put up their own money, driven and enjoyed the car for a year then sells it to you.