I am American but of Asian descent (immigrant parents) and travel to Asia frequently, and this is actually one of my biggest pet peeves. For example, a lot of people loved it but I couldn't finish Cinder by Marissa Meyer because the depiction of futuristic Beijing was so flat and unrealistic to me. There was no Asian culture there. The characters behaved and acted very Western, the author tried to use Chinese pronouns here and there but got them all wrong, everyone was celebrating kimonos and geishas (quintessentially Japanese) in New Beijing, and the whole thing felt like it took place in a semi-American vacuum with some stereotypes of "Asia" slapped on (dumplings! chopsticks!).
I say stick to what you know. Or at least if you want to write about an exotic setting, make sure you do lots and lots of research. Sci-fi can't get away with everything just because "somehow it's the future and things got this way". If you don't explain or at least hint at HOW things got that way then it'll just seem like a cop out for "anything goes".
And just to clarify, I don't think you should feel restricted if you want to write about somewhere else. I believe readers will have tolerance for some mistakes, as long as you made an effort to flesh out the world. Some of Cinder's issues could easily have been fixed just with some primitive googling. It's like... if you get the miao people mixed up with the hui or manchu, I'm already impressed that you went that far, y'know? But not knowing that China, Korea, and Japan have different traditional costumes + history/culture is just lazy.