Originally Posted by Foos
Yep, which means no Korean or American made but Japanese-inspired: Last year Magna Carta, Bioshock and Avatar: The Last Airbender were all turned away, and another American video game was pre-judged, but DQ'd at the last minute when a staffer decided it wasn't eligible, so be sure you're within the scope of the contest.
The other American cosplay was a Commander Shepard from Mass Effect 2. Dragon Age would also be inelligible, even though one of the prizes was a dragon age 2 sword. If anyone is in doubt, I would suggest emailing costume contest coordinator to asking about a specific rule and research the origin to make sure the source is of Japanese origin.