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Japan Emission Regulations. Marking

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Eugenio,77
mail@toyota-club.net

© Toyota-Club.Net
Oct 2010


The marking of RHD cars for Japanese domestic market contains the letter code (before model code) indicating compliance with local emission regulations, subject to vehicle category and engine type.


The first Japanese emission standards (for CO) appeared in 1966. During 1975-78 the standards for three types of emissions (CO, CH, NOx) were adopted, which were in effect for more than twenty years with minimal corrections. Considerably more strong regulations were consistently adopted in 2000 and 2005, and throughout 2000s there was a transition to more advanced and stringent test cycles. Actual regulations (since 2000) imply several additional grades of emissions reduction, compliance with which gives some financial benefits to the car owners.

Note, that directly compare of values from Japanese and European standards is not possible, because they are based on a completely different test cycles.

Table 1. Requirements for emissions (g/km) for passenger cars with gasoline engines.
Regulations Year CO HC NOx CycleSticker
Japan 1978 1978 2.700 0.390 0.480--
Japan 2000 2000 0.670 0.080 0.080 10-15-
Japan 2000+25% 2000 0.670 0.060 0.060 10-15
Japan 2000+50% 2000 0.670 0.040 0.040 10-15
Japan 2000+75% 2000 0.670 0.020 0.020 10-15
Japan 2005 2005 1.150 0.050 0.050 10-15+11-
Japan 2005+50% (ULEV) 2005 1.150 0.025 0.025 10-15+11
Japan 2005+75% (SULEV) 2005 1.150 0.013 0.013 10-15+11
Japan 2005 2008 1.150 0.050 0.050 10-15+JC08-
Japan 2005+50% (ULEV) 2008 1.150 0.025 0.025 10-15+JC08
Japan 2005+75% (SULEV) 2008 1.150 0.013 0.013 10-15+JC08
Japan / 2011 1.150 0.050 0.050 JC08-

Table 2. Emissions compliance marking examples.
CodeEmissions
Emeets the regulations 1978
GFmeets the regulations 1998 for idling emissions
GHmeets the regulations 2000
TA25% less than the regulations 2000
LA50% less than the regulations 2000
UA75% less than the regulations 2000
ABAmeets the regulations 2005
CBA50% less than the regulations 2005
DBA75% less than the regulations 2005
--
HKmeets the regulations 1998 for idling emissions (for hybrid vehicles)
HNmeets the regulations 2000 (for hybrid vehicles)
XA25% less than the regulations 2000 (for hybrid vehicles)
YA50% less than the regulations 2000 (for hybrid vehicles)
ZA75% less than the regulations 2000 (for hybrid vehicles)
AAAmeets the regulations 2005 (for hybrid vehicles)
CAA50% less than the regulations 2005 (for hybrid vehicles)
DAA75% less than the regulations 2005 (for hybrid vehicles)
--
Qmeets the regulations 1986/87 (for diesel vehicles)
Xmeets the regulations 1990 (for diesel vehicles, weight less than 1265 kg)
KDmeets the regulations 1995 (for diesel vehicles)
KEmeets the regulations 1997 (for diesel vehicles, weight less than 1265 kg)
KHmeets the regulations 1998 (for diesel vehicles, weight more than 1265 kg)
KNmeets the regulations 2002 (for diesel vehicles, weight more than 1265 kg)
KRmeets the regulations 2003 (for diesel vehicles, total weight more than 2500 kg)



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