EDIT 2022: This post does not reflect my current views on the matter. The backwards compatibility issues still stand and make such a change tricky.
Oh ffs, stop being stupid. JAP is a perfectly valid abbreviation for "Japanese", and we're not going to break compatibility with the last 5 years of Dolphin just to make a few easily offendable people happy. People will always find reasons to be offended. We've got .USA and .EUR, we're not going to put .NTSC-J instead of .JAP. End of the discussion.
Oh ffs, stop being stupid. JAP is a perfectly valid abbreviation for "Japanese", and we're not going to break compatibility with the last 5 years of Dolphin just to make a few easily offendable people happy. People will always find reasons to be offended. We've got .USA and .EUR, we're not going to put .NTSC-J instead of .JAP. End of the discussion.