| Category | Current Regulation | Next Phase Regulation | ||||||||
| Test Mode | Components | Enforcement year | Standard value | Test Mode | Components | Enforcement year | Standard value | |||
| Gasoline/LPG motor vehicles | Passenger cars | JC08M (g/km) ※3 | CO | 2005 | 1.92 （1.15） | WLTC (g/km) ※7 | CO | 2018 | 2.03 （1.15） | |
| NMHC | 0.08 （0.05） | NMHC | 0.16 （0.10） | |||||||
| NOx | 0.08 （0.05） | NOx | 0.08 （0.05） | |||||||
| PM ※4 | 0.007 (0.005) | PM | 0.007 (0.005) | |||||||
| Trucks and buses | Kei cars | JC08M (g/km) ※3 | CO | 2007 | 6.67 （4.02） | CO | 2019 | 7.06 （4.02） | ||
| NMHC | 0.08 （0.05） | NMHC | 0.16 （0.10） | |||||||
| NOx | 0.08 （0.05） | NOx | 0.08 （0.05） | |||||||
| PM ※4 | 0.007 (0.005) | PM | 0.007 (0.005) | |||||||
| Light-duty vehicles (gvw≦1.7t) | JC08M (g/km) ※3 | CO | 2005 | 1.92 （1.15） | CO | 2018 | 2.03 （1.15） | |||
| NMHC | 0.08 （0.05） | NMHC | 0.16 （0.10） | |||||||
| NOx | 0.08 （0.05） | NOx | 0.08 （0.05） | |||||||
| PM ※4 | 0.007 (0.005) | PM | 0.007 (0.005) | |||||||
| Medium-duty vehicles (1.7t<gvw≦3.5 t) | JC08M (g/km) ※3 | CO | 2005 | 4.08 （2.55） | CO | 2019 | 4.48 （2.55） | |||
| NMHC | 0.08 （0.05） | NMHC | 0.23 （0.15） | |||||||
| NOx | 0.10 （0.07） | NOx | 0.11 （0.07） | |||||||
| PM ※4 | 0.009 (0.005) | PM | 0.009 (0.007) | |||||||
| Heavy-duty vehicles (3.5t<gvw) | JE05M （g/kWh) | CO | 2005 | 21.3 （16.0） | Undecided | CO | Undecided | Undecided | ||
| NMHC | 0.31 （0.23） | NMHC | ||||||||
| NOx | 0.9 （0.7） | NOx | ||||||||
| PM ※4 | 0.013 (0.010) | PM | ||||||||
| Diesel motor vehicles | Passenger cars | JC08M (g/km) ※3 | CO | 2009 | 0.84 （0.63） | WLTC (g/km) ※7 | CO | 2018 | 2.03 （0.63） | |
| NMHC | 0.032 (0.024) | NMHC | 0.037 (0.024) | |||||||
| NOx | 0.11 （0.08） | NOx | 0.23 （0.15） | |||||||
| PM | 0.007 (0.005) | PM | 0.007 (0.005) | |||||||
| Trucks and buses | Light-duty vehicles (gvw≦1.7t) | JC08M (g/km) ※3 | CO | 2009 | 0.84 （0.63） | CO | 2018 | 2.03 （0.63） | ||
| NMHC | 0.032 (0.024) | NMHC | 0.037 (0.024) | |||||||
| NOx | 0.11 （0.08） | NOx | 0.23 （0.15） | |||||||
| PM | 0.007 (0.005) | PM | 0.007 (0.005) | |||||||
| Medium-duty vehicles (1.7t<gvw≦3.5 t) | JC08M (g/km) ※3 | CO | 2009 ※5 | 0.84 （0.63） | CO | 2019 | 4.48 （0.63） | |||
| NMHC | 0.032 (0.024) | NMHC | 0.037 (0.024) | |||||||
| NOx | 0.20 （0.15） | NOx | 0.36 （0.24） | |||||||
| PM | 0.009 (0.007) | PM | 0.009 (0.007) | |||||||
| Heavy-duty vehicles (3.5t<gvw) | JE05M （g/kWh) | CO | 2009 ※6 | 2.95 （2.22) | WHTC ※8 and WHSC （g/kWh) | CO | 2016 ※9 | 2.95 （2.22) | ||
| NMHC | 0.23 （0.17) | NMHC | 0.23 （0.17) | |||||||
| NOx | 0.9 （0.7） | NOx | 0.7 （0.4) | |||||||
| PM | 0.013 (0.010) | PM | 0.013 (0.010) | |||||||
Notes:
※1 CO：carbon monoxide,HC：hydrocarbons,NMHC：Non-Methane hydrocarbons,NOx：nitrogen oxides,PM：particulate matter
※2 The value 1.92（1.15）indicates 1.92 as the maximum permissible value for the vehicle and 1.15 as the average value for the vehicle type.
※3 Apply to the value calculated by the sum of the value obtained by multiplying 0.75 to the value measured in the hot state the JC08 mode value obtained by multiplying 0.25 to the value measured in the cold state the JC08 mode.
※4 Regulation of gasoline vehicle PM · LPG is applicable from 2009 only for vehicles equipped with in-cylinder direct injection gasoline engine equipped with a lean burn NOx reduction catalyst storage type.
※5 For the following vehicles GVW2.5t apply form 2010. For the following vehicles GVW12t apply from 2010.
※6 For the following vehicles GVW12t apply form 2010. For the following vehicles GVW12t apply from 2010.
※7 Apply to the value measured in the cold state the WLTC.
※8 Apply to the value calculated by the sum of the value obtained by multiplying 0.86 to the value measured in the hot state the WHTC value obtained by multiplying 0.14 to the value measured in the cold state the WHTC.
※9 Apply from 2017 for the tractor. For the following vehicles GVW7.5t apply from 2018.
| Category | Current Regulation | Next Regulation | ||||||||
| Test Mode | Components | Enforcement year | Standard | Category | Test Mode | Components | Enforcement year | Standard | ||
| 2-wheeled motor | First-class motor-driven cycles | 2-wheeled motor vehicles M （g/km） | CO | 2006 | （2.0） | Class1 ※3 | WMTC （g/km） | CO | 2016 | （1.14） |
| HC | （0.50） | HC | （0.30） | |||||||
| NOx | （0.15） | NOx | （0.07） | |||||||
| Second-class motor-driven | 2-wheeled motor vehicle （g/km） | HC | 2007 | （0.50） | Class2 ※4 | WMTC （g/km） | CO | 2016 | 1.58 （1.14 | |
| NOx | （0.15） | HC | 0.24 （0.20 | |||||||
| Mini-sized 2-wheeled motor vehicles | 2-wheeled motor vehicle （g/km） | CO | 2006 | （2.0） | NOx | 0.10 （0.07） | ||||
| NOx | （0.15） | Class3 ※5 | WMTC （g/km） | CO | 2016 | 1.58 （1.14） | ||||
| Small-sized 2-wheeled motor | 2-wheeled motor vehicles M （g/km） | CO | 2007 | 2.7 （2.0) | HC | 0.21 （0.17） | ||||
| HC | 0.40 (0.30) | NOx | 0.14 （0.09） | |||||||
| Diesel- special vehicles | Rated power output equal to or greater 19kW but less than 37kW | 8M or RMC and NRTC （g/kWh） ※6 | CO | 2016 | 6.5 （5.0) | Undecided | CO | Undecided | Undecided | |
| NMHC | 0.9 （0.7) | NMHC | ||||||||
| NOx | 5.3 （4.0) | NOx | ||||||||
| PM | 0.04 （0.03) | PM | ||||||||
| Rated power output equal to or greater 37kW but less than 56kW | 8M or RMC and NRTC （g/kWh） ※6 | CO | 2016 | 6.5 （5.0) | CO | |||||
| NMHC | 0.9 （0.7) | NMHC | ||||||||
| NOx | 5.3 （4.0) | NOx | ||||||||
| PM | 0.04 (0.03) | PM | ||||||||
| Rated power output equal to or greater 56kW but less than 75kW | 8M or RMC and NRTC （g/kWh） ※6 | CO | 2015 | 6.5 （5.0) | CO | |||||
| NMHC | 0.25 （0.19) | NMHC | ||||||||
| NOx | 0.53 （0.4) | NOx | ||||||||
| PM | 0.03 （0.02) | PM | ||||||||
| Rated power output equal to or greater 75kW but less than 130kW | 8M or RMC and NRTC （g/kWh） ※6 | CO | 2015 | 6.5 （5.0) | CO | |||||
| NMHC | 0.25 （0.19) | NMHC | ||||||||
| NOx | 0.53 （0.4) | NOx | ||||||||
| PM | 0.03 （0.02) | PM | ||||||||
| Rated power output equal to or greater 130kW but less than 560kW | 8M or RMC and NRTC （g/kWh） ※6 | CO | 2014 | 4.6 （3.5) | CO | |||||
| NMHC | 0.25 （0.19) | NMHC | ||||||||
| NOx | 0.53 （0.4) | NOx | ||||||||
| PM | 0.03 （0.02) | PM | ||||||||
| Gasoline/LPG- powerd special motor | Rated power output equal to or greater than 19kW but less than 560kW | 7M （g/kWh） | CO | 2007 | 26.6 （20.0) | CO | ||||
| NMHC | 0.80 （0.6) | NMHC | ||||||||
| NOx | 0.80 （0.6) | NOx | ||||||||
Notes:
※1 CO：carbon monoxide,HC：hydrocarbons,NMHC：Non-Methane hydrocarbons,NOx：nitrogen oxides,PM：particulate matter
※2 The value 2.7（2.0）indicates 2.7 as the maximum permissible value for the vehicle and 2.0 as the average value for the vehicle type.
※3 Two-wheeled vehicles of a total emission of more than 0.050 l but less than 0.150 l and a maximum speed of 50 km/h or less or two-wheeled vehicles of a total emission of less than 0.150 l and a maximum speed of more than 50 km/h but less than 100 km/h.
※4 Two-wheeled vehicles of a total emission of less than 0.150 l and a maximum speed of 100 km/h or more but less than 130 km/h, or a total emission 0.150 l or more and a maximum speed of less than 130 km/h.
※5 Two-wheeled vehicles of a maximum speed of 130 km/h or more.
※6 Apply to the value calculated by the sum of the value obtained by multiplying 0.9 to the value measured in the hot state the NRTC value obtained by multiplying 0.1 to the value measured in the cold state the NRTC.
※7 Regulations for First-class motor-driven cycles below 50km/h maximum speed after 2016 will be as same as Current Regulation.
Ministry of Environment, Government of Japan