Japan Domestic Market

What is JDM ?
is a term for Japan's economic market for Japanese-brand goods, such as automobiles and parts. The term's most common application is to Japanese-brand automobiles built specifically for the Japanese market, i.e., designed and constructed to conform to Japanese vehicle and equipment regulations and to suit Japanese market preferences. JDM vehicles migrate to other markets through ordinary commerce and the grey market.

Example
JDM vehicles often differ in features and equipment from vehicles sold elsewhere. For example, Honda has produced many different versions of the B18C, B16A and K20A engines for various markets worldwide. Generally, engines intended for use outside Japan have been detuned because Japanese Gasoline (Petrol) is of a higher octane rating than is generally available in other markets.

Wy headlamps shyne more one side of the road ?
There are safety hazards associated with using JDM headlamps in countries where traffic flows along the right side of the road, because JDM headlamps, engineered for use on the left side of the road, fail to light the right-side driver's way safely ahead while blinding oncoming motorists. Nevertheless, primarily due to marketing efforts, JDM headlamps are quite popular.

SOoo...
In automotive culture, JDM refers to a style of modifying automobiles, mainly cars of Japanese origin. The function of components is often preferred over cosmetic appeal."True" Japanese Domestic Market components are also preferred over Japanese aftermarket parts. An example of one such market is the import of used Japanese engines to North America to be put into Honda, Nissan, Toyota, Mazda, Subaru and Mitsubishi sports and street cars for higher performance outputs.

My opinion..
for u gonna be a true JDM u have to know all of them becouse this have to be respect! These japanese modify style dont woory how look it beautiful the car is, all of the parts have function, if he put or not a bumper is not becouse the bumper is beautiful or if original it look like better..
Ó beautiful bumper i wil put on my car for gonna be jdm or i wanna stay my car default only with nice japanese rims and bigger one.. NOO THis not JDM, this is TUNING what they call on brazil, if some japanese or any people wanna make some jdm, he has to put all the parts for PERFORMANCEE, now u know sometime nobody put aerodynamic on the japanese cars ?? yeaa if u know the lonely rimms increase on performance on the car, they have to be choiced with caree ! im forgeting u have to know all japanese chassis, japanese engines, Aftermarkets all of automobile or japanese markets.. when u prepared u can gona be a true or tune JDM fan, yea japanese machines is myl life so i already studied a lot for this, i didnt start know only becouse i saw on anime or playing some game, i exchanged a lot of informations with another peoples who knows a lot for learn all about then.. that's wy have to be respect ! so if wanna be a jdm try to know about what is! then u can try be a TRUE ONE LEGEND ! ^^ if u need help AsK me
Hai