We have gone back and forth about his and it is my feeling that; In playing it, its clearly an homage to the game style that came out of Japan in the 80's and 90's. To me Fanime should be honoring anime, its style, and culture. We should not get hung up on the geographic location or cultural/racial background of its creators. With that I am announcing that Undertale is a qualifying source for the masquerade entries
Erik