I have recently found a seller of a used Japanese new 3ds for a good price (~$140). I found out he has an exploitable firmware on it, but looking around here I gbatemp I can hardly seem to find any info on japanese n3dses running ntsc emunands. If I could get any help that would be great. If it is useful, my bother has a sky3ds that I could use as a japanese copy of cubic ninja. Thanks guys!