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

Schedule of estimated useful lives of property plant and equipment (Details) | 12 Months Ended
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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

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- References No definition available. + Details
Name: | YMAT_IfrsStatementLineItems
Namespace Prefix: | YMAT_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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

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

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

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

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