Japan Emission Regulations – Marking

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.

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 Cycle Sticker
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

Code Emissions
E meets the regulations 1978
GF meets the regulations 1998 for idling emissions
GH meets the regulations 2000
TA 25% less than the regulations 2000
LA 50% less than the regulations 2000
UA 75% less than the regulations 2000
ABA meets the regulations 2005
CBA 50% less than the regulations 2005
DBA 75% less than the regulations 2005
HK meets the regulations 1998 for idling emissions (for hybrid vehicles)
HN meets the regulations 2000 (for hybrid vehicles)
XA 25% less than the regulations 2000 (for hybrid vehicles)
YA 50% less than the regulations 2000 (for hybrid vehicles)
ZA 75% less than the regulations 2000 (for hybrid vehicles)
AAA meets the regulations 2005 (for hybrid vehicles)
CAA 50% less than the regulations 2005 (for hybrid vehicles)
DAA 75% less than the regulations 2005 (for hybrid vehicles)
Q meets the regulations 1986/87 (for diesel vehicles)
X meets the regulations 1990 (for diesel vehicles, weight less than 1265 kg)
KD meets the regulations 1995 (for diesel vehicles)
KE meets the regulations 1997 (for diesel vehicles, weight less than 1265 kg)
KH meets the regulations 1998 (for diesel vehicles, weight more than 1265 kg)
KN meets the regulations 2002 (for diesel vehicles, weight more than 1265 kg)
KR meets the regulations 2003 (for diesel vehicles, total weight more than 2500 kg)

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