Accrued management fees.

No definition available.

Name:	ck0001893262_AccruedManagementFees
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Accrued Performnce Participation Allocation

+ References

No definition available.

+ Details

Name:	ck0001893262_AccruedPerformnceParticipationAllocation
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate purchase amount

+ References

No definition available.

+ Details

Name:	ck0001893262_AggregatePurchaseAmount
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount reimbursed to adviser.

+ References

No definition available.

+ Details

Name:	ck0001893262_AmountReimbursedToAdviser
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Annual catch-up percentage.

+ References

No definition available.

+ Details

Name:	ck0001893262_AnnualCatchUpPercentage
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Annual hurdle percentage.

+ References

No definition available.

+ Details

Name:	ck0001893262_AnnualHurdlePercentage
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Annual stock holder servicing fee percentage.

+ References

No definition available.

+ Details

Name:	ck0001893262_AnnualStockHolderServicingFeePercentage
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Annual stock holder servicing fee percentage of gross proceeds limit.

+ References

No definition available.

+ Details

Name:	ck0001893262_AnnualStockHolderServicingFeePercentageOfGrossProceedsLimit
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Capital commitments from investors.

+ References

No definition available.

+ Details

Name:	ck0001893262_CapitalCommitmentsFromInvestors
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Expiration date of subscription agreement.

+ References

No definition available.

+ Details

Name:	ck0001893262_ExpirationDateOfSubscriptionAgreement
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Future net asset value threshold.

+ References

No definition available.

+ Details

Name:	ck0001893262_FutureNetAssetValueThreshold
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Management fee equal to percentage of net asset value per annum.

+ References

No definition available.

+ Details

Name:	ck0001893262_ManagementFeeEqualToPercentageOfNetAssetValuePerAnnum
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Management fees.

+ References

No definition available.

+ Details

Name:	ck0001893262_ManagementFees
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum capital commitments.

+ References

No definition available.

+ Details

Name:	ck0001893262_MaximumCapitalCommitments
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Net asset value to reimburse operating expenses.

+ References

No definition available.

+ Details

Name:	ck0001893262_NetAssetValueToReimburseOperatingExpenses
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Organization and offering costs.

+ References

No definition available.

+ Details

Name:	ck0001893262_OrganizationAndOfferingCosts
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Organization and offering expenses due.

+ References

No definition available.

+ Details

Name:	ck0001893262_OrganizationAndOfferingExpensesDue
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of proceeds from net monthly offerings.

+ References

No definition available.

+ Details

Name:	ck0001893262_PercentageOfProceedsFromNetMonthlyOfferings
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of proceeds from net monthly offerings but not to exceed remaining availability share of repurchases.

+ References

No definition available.

+ Details

Name:	ck0001893262_PercentageOfProceedsFromNetMonthlyOfferingsButNotToExceedRemainingAvailabilityShareOfRepurchases
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period to reimburse the advisor for all advanced organization and offering expenses following the one year anniversary of the date.

+ References

No definition available.

+ Details

Name:	ck0001893262_PeriodForReimbursementOfAdvanceExpenses
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period for reimbursement of operating expenses.

+ References

No definition available.

+ Details

Name:	ck0001893262_PeriodForReimbursementOfOperatingExpenses
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Related party performance participation allocation percentage of annual return.

+ References

No definition available.

+ Details

Name:	ck0001893262_RelatedPartyPerformanceParticipationAllocationPercentageOfAnnualReturn
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Selling commissions and dealer manager fees percentage on transaction price.

+ References

No definition available.

+ Details

Name:	ck0001893262_SellingCommissionsAndDealerManagerFeesPercentageOnTransactionPrice
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Stockholder servicing fees.

+ References

No definition available.

+ Details

Name:	ck0001893262_StockholderServicingFees
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Upfront dealer manager fees maximum

+ References

No definition available.

+ Details

Name:	ck0001893262_UpfrontDealerManagerFeesMaximum
Namespace Prefix:	ck0001893262_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Upfront dealer manager fees maximum percentage.

+ References

No definition available.

+ Details

Name:	ck0001893262_UpfrontDealerManagerFeesMaximumPercentage
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Upfront selling commissions maximum percentage.

+ References

No definition available.

+ Details

Name:	ck0001893262_UpfrontSellingCommissionsMaximumPercentage
Namespace Prefix:	ck0001893262_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of distribution payable to ownership interest holder from investment income and return of capital.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(10)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 405
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478790/946-405-45-2

+ Details

Name:	us-gaap_DistributionPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476153/220-40-55-4

+ Details

Name:	us-gaap_OperatingExpenses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Total change in each class of partners' capital accounts during the year due to the sale of units. All partners include general, limited and preferred partners.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_PartnersCapitalAccountSaleOfUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitsSaleOfUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_TypeOfArrangementAxis=ck0001893262_SecondAmendmentToSubscriptionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_ClassSSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_ClassTSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_ClassDSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_ClassISharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_ClassYSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_ClassXSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_CommonClassEMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=ck0001893262_ClassEOperatingPartnershipUnitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=ck0001893262_ClassXAndYUnitsOfTheOperatingPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ck0001893262_JPMorganInvestmentManagementIncorporatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=ck0001893262_AmendmentToSubscriptionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ck0001893262_LimitedPartnershipAgreementOfJPMorganRealEstateIncomeTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001893262_ClassECommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CapitalUnitsByClassAxis=ck0001893262_ClassDISAndTUnitsOfOperatingPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions - Additional Information (Details) - USD ($) shares in Millions					12 Months Ended
	Jul. 22, 2025	Jul. 22, 2024	May 26, 2022	Feb. 23, 2022	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Jul. 14, 2025
Related Party Transaction [Line Items]
Management fees					$ 1,900,000	$ 1,000,000	$ 400,000
Accrued management fees					1,700,000	200,000
Stockholder servicing fees					6,300,000	1,600,000
Accrued performnce participation allocation					1,400,000	800,000
Organization and offering expenses due					$ 5,400,000	6,900,000
Period for reimbursement of advance expenses		60 months
Period for reimbursement of operating expenses					60 months
Amount reimbursed to adviser					$ 1,500,000
Operating expenses					$ 74,810,000	24,645,000	16,969,000
Second Amendment to Subscription Agreement
Related Party Transaction [Line Items]
Future NAV threshold								$ 1,500,000,000
Percentage of proceeds from net monthly offerings	80.00%
Percentage of proceeds from net monthly offerings but not to exceed remaining availability share of repurchases	80.00%
Class S Shares
Related Party Transaction [Line Items]
Management fee equal to percentage of net asset value per annum.					1.00%
Class T Shares
Related Party Transaction [Line Items]
Management fee equal to percentage of net asset value per annum.					1.00%
Class D Shares
Related Party Transaction [Line Items]
Management fee equal to percentage of net asset value per annum.					1.00%
Class I Shares
Related Party Transaction [Line Items]
Management fee equal to percentage of net asset value per annum.					1.00%
Class Y Shares
Related Party Transaction [Line Items]
Management fee equal to percentage of net asset value per annum.					0.75%
Class X Shares
Related Party Transaction [Line Items]
Management fee equal to percentage of net asset value per annum.					0.75%
Class E Shares
Related Party Transaction [Line Items]
Sale of operating partnership units for exchange of investment						5,800,000
Class E Operating Partnership Unit
Related Party Transaction [Line Items]
Distribution payable					$ 200,000	$ 400,000	$ 400,000
Class X and Y units of Operating Partnership
Related Party Transaction [Line Items]
Related party allocation percentage of annual total return					10.00%
Annual hurdle percentage					7.00%
Annual catch-up percentage					50.00%
Adviser \| Amendment to Subscription Agreement
Related Party Transaction [Line Items]
Expiration date of subscription agreement			Aug. 23, 2023
Adviser \| Class E Shares
Related Party Transaction [Line Items]
Sale of operating partnership units						0.5
Capital commitments from investors				$ 100,000,000
Maximum capital commitments				75,000,000
Adviser \| Class E Operating Partnership Unit
Related Party Transaction [Line Items]
Sale of operating partnership units						9.0
Sale of operating partnership units for exchange of investment						$ 94,200,000
Adviser \| Class E Operating Partnership Unit \| Class E Shares
Related Party Transaction [Line Items]
Aggregate purchase amount				$ 100,000,000
Limited Partnership Agreement of JPMREIT
Related Party Transaction [Line Items]
Stockholder servicing fees					$ 6,300,000
Organization and offering costs					7,500,000
NAV to reimburse operating expenses					1,000,000,000
Operating expenses					$ 14,300,000	$ 11,000,000
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class S Shares
Related Party Transaction [Line Items]
Upfront selling commissions maximum percentage.					3.50%
Annual stockholder servicing fee percentage					0.85%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class S Shares \| Maximum
Related Party Transaction [Line Items]
Annual stockholder servicing fee percentage					8.75%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class T Shares
Related Party Transaction [Line Items]
Upfront selling commissions maximum percentage.					3.00%
Upfront Dealer Manager Fees Maximum Percentage					0.50%
Annual stockholder servicing fee percentage					0.85%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class T Shares \| Maximum
Related Party Transaction [Line Items]
Upfront selling commissions and dealer manager fee percentage					3.50%
Annual stockholder servicing fee percentage					8.75%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class D Shares
Related Party Transaction [Line Items]
Upfront selling commissions maximum percentage.					1.50%
Annual stockholder servicing fee percentage					0.25%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class D Shares \| Maximum
Related Party Transaction [Line Items]
Annual stockholder servicing fee percentage					8.75%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class I Shares
Related Party Transaction [Line Items]
Upfront dealer manager fees maximum					$ 0
Annual stockholder servicing fee percentage					0.00%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class E Common Stock [Member]
Related Party Transaction [Line Items]
Annual stockholder servicing fee percentage					0.00%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class Y Shares
Related Party Transaction [Line Items]
Annual stockholder servicing fee percentage					0.85%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class Y Shares \| Maximum
Related Party Transaction [Line Items]
Annual stockholder servicing fee percentage					8.75%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class X Shares
Related Party Transaction [Line Items]
Upfront dealer manager fees maximum					$ 0
Annual stockholder servicing fee percentage					0.00%
Limited Partnership Agreement of JPMREIT \| Primary Offering \| Class E Shares
Related Party Transaction [Line Items]
Upfront dealer manager fees maximum					$ 0
Limited Partnership Agreement of JPMREIT \| Private offering \| Class Y Shares
Related Party Transaction [Line Items]
Upfront selling commissions maximum percentage.					3.50%
Limited Partnership Agreement of JPMREIT \| Class D, I, S and T Units of Operating Partnership
Related Party Transaction [Line Items]
Related party allocation percentage of annual total return					12.50%
Annual hurdle percentage					5.00%