16 Feb 2010 Proposal for amendments to document GRB-2010-03 (Japan) GRB-51-23 2010-02-16 Japan
25 May 2010 Revised proposal for amendments to document GRB-2010-03 (Japan) GRB-51-23/Rev.1 2010-05-25 Japan
28 Jan 2015 Proposal for amendments to Regulation No. 117 (Japan) GRB-61-06 2015-01-28 Proposal from Japan, pursuant to the discussion of document GRB/2014/8 during the previous GRB session, to correct perceived inconsistencies in time measurement accuracy in annex 6. Japan
31 Aug 2016 Japan remarks on the list of subjects for future consideration by the Working Party on Noise (Japan) GRB-64-10 2016-08-31 Japan
13 Sep 2018 Snow tyres provisions: status report (BIPAVER, ETRTO, Finland, France, Germany, Russia, and Japan) GRB-68-23 2018-09-13 BIPAVER ETRTO Finland France Germany Russia Japan
30 Aug 2022 UN R117: Proposal for amendments to the 04 series of amendments (Japan) GRBP-76-17 2022-08-30 Proposal introduces a new definition for taxi tyres and establishes different threshold from other tyres. Japan
30 Aug 2022 UN R117: Presentation on the introduction of new class C1 Taxi tyre (Japan) GRBP-76-18 2022-08-30 Japan
24 Jan 2024 UN R117: Proposal for amendment to Supplement 16 to 02 series of amendments (Japan) GRBP-79-07 2024-01-24 Japan
24 Jan 2024 UN R117: Proposal for Supplement 2 to the 03 Series of amendments (Japan) GRBP-79-08 2024-01-24 Japan
24 Jan 2024 UN R117: Proposal for Supplement 16 to 02 Series of amendments (Japan) GRBP-79-09 2024-01-24 Japan
24 Jan 2024 UN R117: Proposal for amendments to GRBP/2024/6, 7 and 9 (Japan) GRBP-79-10 2024-01-24 Japan
15 Nov 2019 UN R117: Proposal for a Supplement to the 02 series of amendments (Japan) GRBP/2020/6 2019-11-15 Proposal to adapt the rolling-sound measurement procedures to accommodate special C2 tyres presenting a section width wider than 200 mm, aspect ratio lower than 55, rim diameter code lower than 15 and without any dual fitting indication (i.e. the front size 175/75R15 LT and the rear size 235/50R14 LT or the front size 175/75R15 LT and the rear size 265/50R14 LT). Japan
20 Jun 2025 UN R117: Proposal for a Supplement 4 to the 04 series of amendments (Japan) GRBP/2025/26 2025-06-20 Proposal to clarify tyre abrasion provisions, including to add an ice temperature range of -5°C to -2°C to the test conditions for ice grip tyres. Japan
13 May 2021 Comments on the draft Sound Limits task force guidelines (Japan) TFSL-02-03/Rev.1 2021-05-13 Japan
5 Apr 2022 Results of simulation studies on reducing automobile noise by tightening regulations (Japan) TFVS-08-04/Rev.1 2022-04-05 Japan
18 Oct 2019 Worn tyres: Japan test campaign (Japan) WT-04-03 2019-10-18 Japan
13 Feb 2020 Japan comments on report of the 8th Worn Tyres working group session (Japan) WT-09-01 2020-02-13 Japan
9 Sep 2021 Proposal for amendments to the Worn Tyres working group terms of reference (Japan) WT-26-08 2021-09-09 Japan
8 Nov 2021 Worn tyres: Position on ETRTO Proposal for Correction Equations (Revision 2) (Japan) WT-29-02 2021-11-08 Japan
27 Jan 2022 UN R117: Proposal to amend document WP.29/2022/11 on worn tyres (Japan) WT-34-06 2022-01-27 Japan
23 May 2022 UN R117: Proposal for Standard Reference Test Tyre (SRTT) in worn state (Japan) WT-40-03 2022-05-23 Japan
25 May 2022 Proposal for C2/C3 tyre wet grip in worn state (Japan) WT-40-04 2022-05-25 Japan
6 Feb 2025 Wet Grip on Worn Tyres: Comments on the proposed revisions to the terms of reference (Japan) WT-66-02 2025-02-06 Japan