No one knows who he is and where he is from. I would also say he is from Japan because that name sound like the Japanese names or even from a country in Asia. But do I have a proof to back my claim up? NO. Do I think some people will think like me? YES. Do I think people will believe me? MAYBE. Will people use my assertion or imagination to write about him in blogs and news websites? YES. This is how typically you stumbled into what you saw that made you think that Satoshi Nakamoto is from Russia. Anyone can come with his opinion but without a clear proof that he is really the one, all will just be left as chasing clouts. There are somethings that looks misery  about bitcoin than only him can unlock and without someone unlocking that, no one will be believed to be him except him when he unlocks those miseries.