What car do you immediately think when you think about the JDM?
I think of the S15 Silvia.
The way I see it, JDM culture revolves around drifting, and the S15 is arguably the king of that scene. Another thing I think about is a car we, in the US, only see in pictures or video games, but never in real life. The S15 is also that.
(Photo credit: Wikipedia)