If you come visit, we have duty free for any electronics above 20k yen or something like that (might be 50k, please check; also they’re stopping this programme in the near future iirc). So you save on the sales tax here. You just can’t open it until you get back to Australia I think. A

lso, since you won’t have warranty anyway, you could consider getting it second hand for a lot cheaper. Any reputable second hand shop will also honour the duty-free shopping programme for foreign tourists.