Yes, it's almost as though one alluded to a Manchurian, or a Siberian... the mental image corresponding to those descriptors will be, the hearer's mind, probably a perfect blank. I think with `Korean', it's only slightly more fleshed out.
Similarly for here. Our vets have complained bitterly that people in this country have only the vaguest idea that we actually did fight a war over there.
Yes, in part. I think it's connected to the fact that during the 19th c., there was that incredible vogue of Japanese `picturesqueness' that Gilbert and Sullivan spoofed so wonderfully in
Patience—remember where the Oscar Wilde figure, Reginald Bunthorne, is confessing in a solitary monologue that `in short, my Mediævalism's affectaaaaation, Born of a mordbid love of admiraaaaaation', in the course of which he notes that, among aspects of his sham, `I do not long for all one sees/That's Japanese'. The tea ceremony, the strange parallelisms between classical Japanese feudalism under the castle warlords on the one hand and Eurpean feudalism, samurai/knight, and the like... all that made Japan a
place, which Europeans could relate to their own ideas of æsthetics and historical romanticism. Korea, though, was an alien place, without points of entry, with information never flowing into European circles of discussion and taste-making. And that hasn't changed much. I have to say, a lot of Americans don't even realize TKD is a Korean art. I didn't, until I started studying it; I thought it was just another style of Japanese karate (now I know better, that it's a style of karate but not a
Japanese style! :lol
That lack of a distinct identity in European and American thinking is, I'd suspect, the major reason for what Iceman noticed and wrote about in his OP....