Tons upon tons of Super Famicom games never saw the light of day outside of Japan. Here's a list of some of the best that are still playable even if you don't understand Japanese or are unable to read kanji.
At a g1's request, I take a look at the PC Engine's Toilet Kids, an import shooter that's teeming with asses and poop and, quite frankly, has no right to exist. Needless to say, I immediately regretted this decision.
The original PlayStation turns TWENTY this year...and I'm sure that makes a lot of gamers feel old, myself included. Take a look at one of the system's launch titles, a beat 'em up from Tecnosoft that never left Japan, but should look and feel familar to gamers all over.