[KSC]

I think you're missing the point (or I am), but JDM, to me isn't a brand or something that simply comes from Japan. It's a part that's made specifically for a Japanese car by the original manufacturer of said car. In other words, anything OEM in Japan is what I consider JDM here.

That being said, right or wrong, if I want Silvia headlights for my 240, a sun visor with Japanese text for a Civic, a SR20 engine, or padded Toyota knee guards for my BRZ, I'm going to be buying "JDM" as that's the only way to buy it.

Edit: we'll, I guess "JDM" would technically denote ANYTHING made in Japan, be it good or bad, so maybe I'm being obtuse. Still, it wasn't considered a bad thing when I was a kid. I can see how it could have been bastardized over the years.