What would be a good substitute for rice wine?
If you can get it, sherry is usually a good bet but since you can't, I've used just regular white wine before as a substitute when you're cooking a dish but you just need to be a little less liberal as you might be with rice wine as I find the flavour tends to be a little stronger.

Another alternative is Sake, but I'm assuming that if you can't get rice wine, you'll struggle to find Sake.