Yeah, it's definitely possible. I got mine by trading by Zekrom for it, I mean, it's not like I use it or anything. Just change the country to Japan, they usually have at least some reasonable trades. If not, try Europe, like France and Spain and Germany and such.
Also, if you're not sure if it's Japanese or not, I'm not sure if it works for the other countries as well, but it should, just check the Pokedex entry of the pokemon. Let's say you think you have a Japanese Ditto, but it has its name in English, you can just check the Pokedex entry of Ditto. If it has a little "J" in a small box, then that means it's from Japan.
I hope this helped.