For Your phrase with such outsized relevance in car lifestyle, "JDM" is surely an acronym for a fairly boring phrase: Japanese Domestic Marketplace. It refers to products built and supposed for sale and use in Japan (i.e., not for export). This features everything from automobiles like the Autozam AZ-one and https://elevemotors.com/product/jdm-toyota-3sgte-engine-for-sale/