Does to me; I guess I think of it as either an adjective or referring to the language. While this usage is technically correct, I think I'd always say "Japanese person". I don't really have a good explanation though of why it's different to "American" or "Canadian" in that regard. Maybe just it's less common for some reason.

Personally, I don't have a problem with the form "I'm married to a Japanese" (this usage comes up a lot for me, although I'm generally referring to Chinese rather than Japanese). But if I were to avoid it, I definitely wouldn't say "I'm married to a Japanese person". I'd say "My wife is Japanese".

I think the referring to "a Japanese" vs "a Japanese man/woman" sounds a little racist, it shouldn't, it makes syntactical sense, but I guess its the cultural influence on the language, I don't know why I brought it up, I was just really taken back when you said "I'm married to a Japanese"

Thanks for the heads up and see my response to tux1968.

It really does sound strange to me as well, almost derogatory in tone. It sounds so much better to my ear to say "i'm married to a Japanese person" or "... person from Japan". But I have no good reason as to why the same doesn't hold for Canadian/American.

Thanks, I think I'll have to keep that in mind when talking in English. The thing is, I thought about writing 'Japanese woman', but her gender seemed besides the point to me, so I didn't want to mention it. In my native tongue (German) there is no unisex term for nationalities, you're either a "Japanerin" (= Japanese woman) or a "Japaner" (= Japanese man). Because of that there might be less subtext when talking about nationalities, but I think this is all just due to the history of your cultural relations - for example in Switzerland there is some negative subtext to the word 'Yugoslave', because their immigrant group was rather unpopular at one point.