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Japanese Domestic Market (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.

JDM cars or short "JDMs" were generally limited to 280 PS and a top speed of 180 km/h (~112 mph, via a speed limiter device), mostly due to safety concerns. The 280 PS limit was lifted in 2004. ^[1] However, the speed limit of 180 km/h is still in effect to this day. In fact, many JDM sports cars have speedometers that only go up to 180 km/h, even though the car would be capable of much higher speeds if it wasn't limited. Some new cars like the Nissan GT-R detect via GPS satellite navigation wether the car is on a japanese race track, and if so, disengage the speed limiter. ^[2]

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. Often times, JDMs for instance have stiffer suspension amd improved throttle response, because japanese buyers are thought to visit race tracks more often, maybe due to the limitations and tight street regulations such as mentioned above. For the US/european market versions, some features may be removed in order to stay below a certain pricing goal for the car, such as using a conventional rear suspension instead of a double wishbone suspension and lack of electronic devices like Active Yaw Control. Furthermore, engine power of JDM sports cars is sometimes reduced for the US market to meet stricter emission standards.

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^[3]. Nevertheless, primarily due to marketing efforts, JDM headlamps are quite popular.

In automotive culture, JDM refers to a style of modifying automobiles, mainly cars of Japanese origin.^{[citation needed]} The function of components is often preferred^[who?] over cosmetic appeal.^{[citation needed]} "True" Japanese Domestic Market components are also preferred^[who?] over Japanese aftermarket parts.^{[citation needed]} 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.^{[citation needed]}

[edit] References

[edit] See also

• Economy of Japan

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