I'm no expert but I know there are a LOT of Japanese SF works. And I've seen a couple of SF films from Korea and China. Russia is definitely into sci-fi and fantasy. The Polish/Ukranian author Stanislaw Lem was a prolific writer of science fiction and philosophy. If memory serves, it was Lem who coined the term robot. He wrote the novel Solaris which was filmed twice. First by the famous Soviet film maker Andrei Tarkovsky, then again as an American production by director Steven Sodorborgh and producer James Cameron! Both are excellent though I prefer the Sodorborgh/Cameron film to the Tarkovsky, which is paced even slower than 2001 (if you can believe that)!
'A screaming comes across the sky. It has happened before, but there is nothing to compare it to now.'