[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.

[m_mueller]

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.