XML 129 R81.htm IDEA: XBRL DOCUMENT v3.26.1

Schedule of estimated useful lives of property plant and equipment (Details)	12 Months Ended
	Dec. 31, 2025
Leasehold improvements [member] | Bottom of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	2 years
Leasehold improvements [member] | Top of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	5 years
Machinery [member] | Bottom of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	3 years
Machinery [member] | Top of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	10 years
Molding Equipment [member] | Bottom of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	2 years
Molding Equipment [member] | Top of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	5 years
Other property, plant and equipment [member] | Bottom of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	2 years
Other property, plant and equipment [member] | Top of range [member]
IfrsStatementLineItems [Line Items]
Estimated useful lives	10 years

X

- References

No definition available.

+ Details

Name:	YMAT_IfrsStatementLineItems
Namespace Prefix:	YMAT_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 73
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_c&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_LeaseholdImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_MachineryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=YMAT_MoldingEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OtherPropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: