For A phrase with such outsized importance in car society, "JDM" is really an acronym for a fairly tedious phrase: Japanese Domestic Market place. It refers to things built and supposed for sale and use in Japan (i.e., not for export). This incorporates every little thing from autos like the https://elevemotors.com/product/2012-toyota-camry-engine-2-5l-vin-d-5th-di/