For The term with this sort of outsized importance in motor vehicle tradition, "JDM" is undoubtedly an acronym for a reasonably uninteresting phrase: Japanese Domestic Industry. It refers to things built and supposed for sale and use within Japan (i.e., not for export). This contains anything from autos similar to https://elevemotors.com/product/2016-chevrolet-spark-gasoline-model-1-4l/