I'm planning to purchase a rice-cooker, but models you can find in Europe do not suit my taste (in terms of functionality and ergonomics) as good as the ones you can find in USA or Japan.

Would anoyone here live in Europe and use a US or Japanese electrical device such as rice-cooker? You need a 110v-200V adaptor, but I guess you also need a transformer for devices of high Watts. Some rice cookers have 1800 Watts...

Well, I'm a bit lost here and would not buy a $170 rice cooker just to know when it arrives that it cannot work in France/Europe...

I'd be surprised if a device such as a rice-cooker would come without a 100-230V power cord. Then again, you can't know for sure.

I've never seen a 100-240V rice cooker, unfortunately.

And all of Europe is not the same is it? I am sure the UK is different. Why not just use an adapter?

You can buy step down transformers like these:
http://tacima.com/tacima_products.html

But it won't be cheap for a high power device.

I think most models sold in Japan for the domestic market will be 100 volts. But there are dual or 220/240v models sold in the duty free shops here.

China runs on 220-240V, so get a Chinese rice cooker.