Japan’s Stance for the R129 Phase 2
43rd GRSP Informal Group on Child Restraint System
25th Mar. 2014
JASIC
Japan’s Stance for R129 Phase2
 Phase 2 amendment should be implemented after
Q10 dummy’s injury criteria are agreed.
OR
 Until Q10 dummy’s injury criteria are agreed, the
scope of Phase 2 should be limited to the CRS size
ranges up to 125 cm.
Correction of formal document
• The following footnote in paragraph 7.1.3.6 to be deleted:
For lateral impact, Q6 dummy could be used for a size range up to
135 cm
Justification
• Table 6 in paragraph 7.1.3.6. of R129 specifies the dummy
used in each dynamic test per CRS size range.
• Safety evaluation for children whose size exceeds 125 cm
cannot be conducted with Q6 dummy.
• In CRS evaluations for sizes 135 cm or above, safety
differences would occur between evaluations that use Q6
dummy (as proposed by the draft amendment) and future
evaluations that use Q10 dummy.
• In the frontal impact test, the target size ranges for
evaluation using Q6 dummy are up to 125 cm.
(Reference) CRS Size Ranges for Booster seat and
Dummies Used in the Dynamic Tests
CRS size range
Frontal
Impact
Side
Impact
105
110
115
120
125
130
135
High back
Cushion
(over140)
Q3
Q6
Q6
Q6
Q6
Q10
Q3
Q6
Q6
Q6
Q6
Q10
145
150
Q10
Q10
Q10
Q10
Q10
Q10
Q10
Q10
Q10
-
-
-
Q10
High back
Cushion
(over140)
140
Q10
*All booster seats in size range 135 cm or below are high back boosters.
 For boosters with high back in size ranges 130 cm and 135 cm, the degree
of difficulty of testing using Q10 dummy is almost the same for both frontal
and side impact tests.
 If Q10 is not used in side impact test for CRS in these ranges, it will be
necessary to amend R129
Correction of formal document
• Paragraph 5.3. to be amended (addition of the part in red):
5.3. Notice of approval or of extension or refusal of approval of an
Enhanced Child Restraint System pursuant to this Regulation shall be
communicated to the Parties to the Agreement which apply this
Regulation by means of a form conforming to the model in Annex 1 to
this Regulation. If part of the enhanced child restraint system could
be used as an infant carrier module and installed as defined in Annex
22, approvals according to this Regulation can only be granted if the
infant carrier module complies with the requirements of this annex.
Justification
• The provision in red about carrycots in Annex 22
can be deleted when all the CRS types, including
the seat belt-secured type in Phase 3, are
included in the scope of R129. Currently,
amendment is still in Phase 2, and the red part is
still necessary.