Japan’s already gotten some downloadable 3DS demos, but the same treatment is soon on the way for North America — and it starts tomorrow.

Our demo rollout won’t be nearly as swift as Japan’s, however — and there’s only about a 40% overlap. What, you actually thought that Theatrhythm Final Fantasy would get a demo over here? (Okay, I had hoped that this would happen at some point, but I wasn’t delusional about it like you are or anything.)

Tomorrow, a demo for Resident Evil Revelations will be available, followed by a demo of Mario & Sonic at the London 2012 Olympic Games on Jan. 26.

“The demo program allows Nintendo 3DS players to be among the first to test-drive select games,” said Tony Elison, Nintendo of America’s senior director and general manager of Network Business. “Players can try out new genres or series, often weeks before the full versions are available in stores.”

Other demos are also on the way, including one for Rayman Origins and Metal Gear Solid Snake Eater 3D.