13 Dec 2019 WLTP UNR 00 series informal document for GRPE/2020/3 (additional) (Japan) - 2019-12-13 Japan
13 Dec 2019 WLTP UNR 00 series informal document for GRPE/2020/3 (Japan) - 2019-12-13 Japan
13 Dec 2019 WLTP UNR 01 series informal document for GRPE/2020/4 (additional) (Japan) - 2019-12-13 Japan
13 Dec 2019 WLTP UNR ODB provisions- Japan comment (Japan) - 2019-12-13 Japan
19 Dec 2019 WLTP fuel efficiency CoP evaluation (Japan) - 2019-12-19 Japan
2 Jan 2020 WLTP UN Regulation: Japan comments on draft 00 series of amendments (Japan) - 2020-01-02 Japan
2 Jan 2020 WLTP UN Regulation: Japan comments on RMSSE drive trace indices (Japan) - 2020-01-02 Japan
2 Jan 2020 WLTP UN Regulation: Japan comments on draft durability family/deterioration factors provisions (Japan) - 2020-01-02 Japan
2 Jan 2020 WLTP UN Regulation: Japan FE calculation process (Japan) - 2020-01-02 Japan
13 Jan 2020 WLTP UN Regulation: 00 series of amendments-Japan comments on RMSSE indices (Japan) - 2020-01-13 Japan
13 Feb 2020 WLTP EV test diagram proposal (revision 2) (Japan) - 2020-02-13 Japan
26 Feb 2020 Japan proposal for WLTP EV test diagram (version 4) (Japan) - 2020-02-26 Japan
24 Feb Comments on GTR 22 and UN R154-04 amendment (Japan) EVE-94-15 2026-02-24 Japan
7 Jan 2021 UN R154: Proposal for Supplement 1 (EC and Japan) GRPE-82-10 2021-01-07 Proposal to correct errors and clarify provisions based on requirements introduced in the Amendment 6 to UN GTR No. 15. EC Japan
7 Jan 2021 UN R154: Proposal for Supplement 1 to the 01 series of amendments (EC and Japan) GRPE-82-11 2021-01-07 Proposal to correct errors and clarify provisions based on requirements introduced in the Amendment 6 to UN GTR No. 15. EC Japan
28 May 2021 UN R154: Proposal for a Supplement (EC and Japan) GRPE-83-07 2021-05-28 Proposal to address use of the phrase “if PN measurement is required” throughout the regulation given that PN measurement in both Level 1A and Level 1B is now required. EC Japan
28 May 2021 UN R154: Proposal for a Supplement to the 01 series of amendments (EC and Japan) GRPE-83-08 2021-05-28 Proposal to modify provisions of the 01 series pursuant to consideration of the proposal to address the use of the phrase "if PN measurement is required" in the original text of the regulation. EC Japan
10 Nov 2021 UN R154: Proposal for amendments to document GRPE/2021/21 (EU, Japan, and OICA) GRPE-84-06 2021-11-10 The proposed amendments are also available in a consolidated text with tracked changes in <a href="https://unece.org/sites/default/files/2021-11/GRPE-84-07e_track.pdf" target="_blank">pdf format</a> and in <a href="https://unece.org/sites/default/files/2021-11/GRPE-84-07e_track.docx" target="_blank">docx format</a>. EU Japan OICA
10 Nov 2021 UN R154: Proposal for amendments to document GRPE/2021/22 (EU, Japan, and OICA) GRPE-84-07 2021-11-10 The consolidated text with amendments also available with tracked changes in <a href="https://unece.org/sites/default/files/2021-11/GRPE-84-07e_track.pdf" target="_blank">pdf format</a> and <a href="https://unece.org/sites/default/files/2021-11/GRPE-84-07e_track.docx" target="_blank">docx format</a>. EU Japan OICA
10 Nov 2021 UN R154: Table of main changes in the draft 02 and 03 series of amendments (EU, Japan, and OICA) GRPE-84-08 2021-11-10 EU Japan OICA
10 Dec 2021 Proposals for Future UN R154 Amendments (Japan) GRPE-85-02 2021-12-10 Japan
29 Dec 2022 UN R154: Proposal to amend the 02 series of amendments (Japan) GRPE-87-17 2022-12-29 Proposal for corrections and clarifications to the amendments in WP.29/2022/41/Rev.1 based on GRPE/2021/21 addressing particle number emissions, including handling of electric vehicles and Conformity of Production. Japan
29 Dec 2022 UN R154: Proposal for amendments to the 03 series of amendments (Japan) GRPE-87-18 2022-12-29 Proposal for corrections and clarifications to the amendments in WP.29/2022/42/Rev.1 based on GRPE/2021/21 addressing particle number emissions, including handling of electric vehicles and Conformity of Production. Japan
29 Dec 2022 UN R154: Summary of proposals for amendments to the 02 and 03 series of amendments (Japan) GRPE-87-19 2022-12-29 Japan
2 Jun 2023 UN R154: Proposal to amend GRPE/2023/16 (EC, Japan, and OICA) GRPE-89-16/Rev.1 2023-06-02 EC Japan OICA
2 Jun 2023 UN R154: Proposal to amend GRPE/2023/17 (EC, Japan, and OICA) GRPE-89-17/Rev.1 2023-06-02 EC Japan OICA
5 Jan 2024 UN R154: Proposal for Supplement 2 to the 02 series of amendments (Japan) GRPE-90-21 2024-01-05 Updates to GRPE/2024/10 Japan
5 Jan 2024 UN R154: Proposal for Supplement 2 to the 03 series of amendments (Japan) GRPE-90-22 2024-01-05 Japan
5 Jan 2024 UN R154: Future amendment plan (Japan) GRPE-90-23 2024-01-05 Japan
10 Oct 2024 UN R154: Presentation on proposal for a new series of amendments (Japan) GRPE-91-11 2024-10-10 Japan
20 Mar 2025 UN R154: Request for review and/or approval (EC, Japan, OICA, and UK) GRPE-92-06 2025-03-20 Review on the possible direction (1) new series of amendment (2)single series structure EC Japan OICA UK
20 Mar 2025 UN R154: Proposal for series of amendments (EC, Germany, Japan, Korea, OICA, Sweden, Switzerland, and UK) GRPE-92-09 2025-03-20 EC Germany Japan Korea OICA Sweden Switzerland UK
17 Oct 2025 UN R154: Proposal for new series of amendment (excluding Level 1C) (EC, Japan, OICA, and UK) GRPE-93-29 2025-10-17 EC Japan OICA UK
16 Oct 2025 UN R154: Explanatory document of the proposals for amendments (EC, Japan, OICA, and UK) GRPE-93-31/Rev.2 2025-10-16 EC Japan OICA UK
18 Mar UN R154: Overall Summary of 04 series of amendments (Japan) GRPE-94-64 2026-03-18 Review of the different proposed amendments (03/04 series with different Supplements) to the regulations Japan
19 Mar UN R154: Proposal to amend GRPE/2026/13 (EC, Japan, OICA, and UK) GRPE-94-66 2026-03-19 EC Japan OICA UK
3 Sep 2021 UN R154: Proposal for a 02 series of amendments (EC, Japan, and OICA) GRPE/2021/21 2021-09-03 Proposal to introduce particle number requirements and limits for Level 1B. The proposal also aligns the particulate measurement procedures with changes introduced in GTR No 15 Amendment 6 and other adaptations to technical progress. EC Japan OICA
3 Sep 2021 UN R154: Proposal for a 03 series of amendments (EC, Japan, and OICA) GRPE/2021/22 2021-09-03 Proposal to ensure that Level 2 is the latest version of this Regulation and is therefore subject to mutual recognition under the 1958 Agreement, given that there is a concurrent proposal to for an 02 series of amendments which introduces particle number requirements and limits for Level 1B. This proposal for a 03 series of amendments also aligns the particulate measurement procedures with changes introduced in GTR No 15 Amendment 6 as well as other adaptations to technical progress. EC Japan OICA
16 Mar 2023 UN R154: Proposal for Supplement 1 to the 02 series of amendments (EC, Japan, and OICA) GRPE/2023/16 2023-03-16 Proposal to align the Regulation with the latest regional requirements. EC Japan OICA
16 Mar 2023 UN R154: Proposal for Supplement 1 to the 03 series of amendments (EC, Japan, and OICA) GRPE/2023/17 2023-03-16 Proposal to align the Regulation with the latest regional requirements. EC Japan OICA
31 Oct 2023 UN R154: Proposal for Supplement 2 to the 02 series of amendments (Japan) GRPE/2024/10 2023-10-31 Proposal to amend Additive Deterioration factors in line with changes to corresponding regional provisions prompted by potential manipulation observed in the region and scheduled for introduction from October 2024. Japan
31 Oct 2023 UN R154: Proposal for Supplement 2 to the 03 series of amendments (Japan) GRPE/2024/11 2023-10-31 Proposal to amend Additive Deterioration factors in line with changes to corresponding regional provisions prompted by potential manipulation observed in the region and scheduled for introduction from October 2024. Japan
5 Jan UN R154: Proposal for a Supplement to the 04 series of amendments (EC, Japan, OICA, and UK) GRPE/2026/13 2026-01-05 Proposal to introduce provisions relating to <ul><li>Manipulation Devices and Strategies that were previously in the 09 series of amendments to UN R83,</li><li>the levels to which certain provisions apply,</li><li>clarifications and corrections to the requirements for the laboratory test for pure electric range ratio at low temperature for Pure Electric Vehicles</li><li>an update to allow the use in Levels 1A and 2 of actual tyre rolling resistance values to calculate the final road load coefficient for the individual vehicles, and</li><li>align the Regulation with the current regional status and the current state-of-the-art.</li></ul> EC Japan OICA UK
6 Nov 2025 IWVTA: Small-Volume Manufacturers (SVM) (Japan) IWVTA-49-06 2025-11-06 Japan
12 Mar 2020 WLTP low-temperature test procedures: Japan positions on open issues (Japan) LTTF-39-03 2020-03-12 Japan
7 May 2020 GTR 15: Japan input for Amendment 6 (Japan) LTTF-42-02 2020-05-07 Japan
7 May 2020 WLTP Low-Temperature Family input for ICE and HEV (Japan) LTTF-42-03 2020-05-07 Japan
28 May 2020 WLTP Low Temperature: Proposal for selection of vehicles for Type 6 testing (ICE, NOVC-HEV, OVC-HEV) (EC and Japan) LTTF-43-05 2020-05-28 EC Japan
12 Dec 2018 WLTP CoP procedure (updated as of 14 November 2018) (Japan) TFCoP-01-03 2018-12-12 Japan
11 Dec 2018 WLTP CoP comparative analysis (version 3) (Japan) TFCoP-02-01 2018-12-11 Japan
12 Dec 2018 WLTP CoP comparative analysis (version 4) (Japan) TFCoP-02-01/Rev.1 2018-12-12 Japan
22 Jan 2019 COP Procedure for Fuel Consumption/ Electric Energy Consumption (Japan) TFCoP-03-04 2019-01-22 Japan
15 Feb 2019 WLTP Conformity of Production procedure (Japan) TFCoP-04-02 2019-02-15 EU/JPN CO2/FC COP Procedures Japan
8 Mar 2019 WLTP Conformity of Production: Clarification of Japan's position (Japan) TFCoP-05-04 2019-03-08 Japan
15 Apr 2019 WLTP CoP: PEV and OVC-HEV procedure in Japan (Japan) TFCoP-06-05 2019-04-15 Japan
2 May 2019 COP procedure for Fuel Consumption/Electric Energy Consumption in Japan (Japan) TFCoP-07-03 2019-05-02 Japan
11 Jul 2019 COP procedure for Fuel Consumption/Electric Energy Consumption in Japan (Japan) TFCoP-09-05 2019-07-11 Japan
20 Aug 2019 COP procedure for Fuel Consumption/Electric Energy Consumption in Japan (Japan) TFCoP-10-02 2019-08-20 Japan
16 Apr 2018 WLTP: Points to be taken care of during UNR_WLTP Type V (durability) (Japan) WLTP-22-08/App.1a 2018-04-16 Proposal by Japan of items to be addressed during the development of the Type V (durability) testing under the draft WLTP UN Regulation. Japan
20 Sep 2018 WLTP UN Regulation: Structure and content comments (Japan) WLTP-24-03/App.01 2018-09-20 Japan
20 Sep 2018 WLTP COP Procedure in Japan (Japan) WLTP-24-12/App.01 2018-09-20 Japan
15 Apr 2019 Additional WLTP UN Regulation discussion points (Japan) WLTP-26-06 2019-04-15 Japan
17 Apr 2019 WLTP: Comparison of EU and Japan provisions on durability (Japan) WLTP-26-08/App.1 2019-04-17 Japan
26 Sep 2019 WLTP EVAP Conformity of Production: UN R83 method revision (Japan) WLTP-28-05/App.2 2019-09-26 Japan
23 Sep 2019 Japan comments on WLTP Low Temperature task force open issues list (Japan) WLTP-28-13/App.2 2019-09-23 Japan
15 Oct 2024 Input on UN R154 update topics (CLEPA, Japan, and OICA) WLTP-AH-01-02 2024-10-15 CLEPA Japan OICA
17 Jan 2025 UN R154: Observations on implementation of Euro 7 provisions (Japan) WLTP-AH-03-02 2025-01-17 Japan
16 Mar 2025 UN R154: Proposal for new series of amendments (EC, Japan, Korea, OICA, Sweden, Switzerland, and UK) WLTP-AH-04-05 2025-03-16 Draft proposal to align the Regulation with the latest regional requirements (e.g., Euro 7) as submitted to GRPE (Informal document GRPE-92-09e). EC Japan Korea OICA Sweden Switzerland UK
13 Sep 2025 UN R154: Comments on draft 04 series of amendments (France and Japan) WLTP-AH-LDN-04/Rev.1 2025-09-13 France Japan
18 Sep 2025 UN R154: Comments and amendments to the proposal for a new series (GRPE/2025/15) (Japan) WLTP-AH-LDN-16 2025-09-18 Japan
27 Nov 2025 UN R154: Comments on application of levels in draft series of amendments (Japan) WLTP-AH-08-01/Rev.1 2025-11-27 Japan
13 Oct 2025 UN R154: Updates concerning OVC-HFCV (Japan) WLTP-AH-GVA-02 2025-10-13 UN R154 specifies unique identifiers for vehicle families in the format FT-nnnnnnnnnnnnnnn-WMI, where FT designates family type: IP for Interpolation family, RL for Road load family, RM for Road load matrix family, PR for Periodically regenerating systems family, AT for ATCT family, EV for Evaporative emissions family, DF for Durability family, OB for OBD family, ER for Exhaust after-treatment system using reagent family, GV for Gas Fuelled Vehicle family, KC for KCO₂ correction factor family, RT for Low temperature range family, MF for Monitor family, BD for Battery Durability family, VD for virtual distance family, and LP for Lower limit pressure family. The document establishes reporting requirements for fuel consumption, electric energy consumption, and fuel efficiency for various vehicle types including OVC-FCHVs and NOVC-FCHVs, with driving range of hydrogen calculated according to specified procedures. Japan
1 Mar UN R154: Clarification of the applicable level (Japan) WLTP-AH-10-01 2026-03-01 Japan
18 Feb 2020 WLTP: Proposals for PEV procedures for Type VI test (Japan) WLTP-IMD-03 2020-02-18 Japan
4 Mar 2020 Input on the WLTP low-temperature test procedure open issues (Japan) WLTP-SG-EV-37-05 2020-03-04 Japan
10 Mar 2020 WLTP: Preliminary EC and Japan feedback on the overview of required parameters during Type 6 testing (EC and Japan) WLTP-SG-EV-37-08 2020-03-10 EC Japan
13 Mar 2020 Japan positions on WLTP EV Subgroup and Low-Temperature Task Force open issues (Japan) WLTP-SG-EV-38-10 2020-03-13 Japan
26 Mar 2020 WLTP: Japan input on REESS testing provisions (Japan) WLTP-SG-EV-39-03 2020-03-26 Japan
8 Apr 2020 WLTP Type 6 procedure EV battery charge operation feedback (Japan) WLTP-SG-EV-40-04 2020-04-08 Japan
26 May 2020 WLTP: PEV Low Temperature and Calculation Scheme (Japan) WLTP-SG-EV-43-10 2020-05-26 Japan
26 May 2020 WLTP: Type 6 test vehicle selection proposal-ICE/NOVC/OVC-HEV (EC and Japan) WLTP-SG-EV-43-11 2020-05-26 Proposal with EC and Japan input. EC Japan
14 Apr 2019 WLTP UN Regulation additional discussion points (Japan) WLTP-TTF-01-07 2019-04-14 Japan
20 Apr 2020 WLTP: Proposal for amendments to ECE/TRANS/WP.29/2020/77 (EC and Japan) WP.29/2020/92 2020-04-20 Proposal to correct errors and clarify provisions in the draft UN Regulation on WLTP. EC Japan
20 Apr 2020 WLTP: Proposal for amendments to ECE/TRANS/WP.29/2020/78 (EC and Japan) WP.29/2020/93 2020-04-20 Proposal to correct errors and clarify provisions of the draft 01 series of amendments to the draft UN Regulation on WLTP. EC Japan
1 Jan 2021 UN R154: Proposal for Supplement 1 (EC and Japan) WP.29/2021/56 2021-01-01 Proposal to correct errors in the text and to clarify provisions based on Amendment 6 to UN GTR No. 15. EC Japan
1 Jan 2021 UN R154: Proposal for Supplement 1 to the 01 series of amendments (EC and Japan) WP.29/2021/57 2021-01-01 Proposal to correct errors in the text and to clarify provisions based on Amendment 6 to UN GTR No. 15. EC Japan