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Credit Quality of Financial Assets and the Allowance for Credit Losses - Summary of Non-Accrual of Financial Assets (Detail) - JPY (¥) ¥ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Mar. 31, 2023
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | ¥ 64,627 | ¥ 73,401
Ending balance | 88,273 | 64,627
Interest income recognized during the reporting period | 284 | 555
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 2,747 | 2,367
Consumer borrowers | Japan Real Estate Loans |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 1,693 | 1,824
Ending balance | 1,899 | 1,693
Interest income recognized during the reporting period | 126 | 235
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 194 | 41
Consumer borrowers | Overseas Real Estate Loans |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 547 | 475
Ending balance | 941 | 547
Interest income recognized during the reporting period | 0 | 0
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 7 | 0
Consumer borrowers | Japan Card Loans |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 1,367 | 503
Ending balance | 1,938 | 1,367
Interest income recognized during the reporting period | 16 | 28
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 0 | 0
Consumer borrowers | Japan Other |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 5,429 | 2,391
Ending balance | 6,746 | 5,429
Interest income recognized during the reporting period | 101 | 170
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 8 | 10
Consumer borrowers | Overseas Other |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 1,105 | 519
Ending balance | 1,423 | 1,105
Interest income recognized during the reporting period | 0 | 0
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 4 | 0
Corporate borrowers | Overseas Non Recourse Loans |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 3,248 | 8,787
Ending balance | 3,556 | 3,248
Interest income recognized during the reporting period | 0 | 0
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 0 | 0
Corporate borrowers | Japan real estate companies |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 219 | 351
Ending balance | 206 | 219
Interest income recognized during the reporting period | 23 | 51
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 8 | 13
Corporate borrowers | Overseas real estate companies |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 12,804 | 20,879
Ending balance | 21,927 | 12,804
Interest income recognized during the reporting period | 0 | 0
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 0 | 0
Corporate borrowers | Japan commercial, industrial companies |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 1,118 | 1,267
Ending balance | 822 | 1,118
Interest income recognized during the reporting period | 18 | 71
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 158 | 190
Corporate borrowers | Overseas commercial, industrial companies and other |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 20,470 | 18,634
Ending balance | 27,936 | 20,470
Interest income recognized during the reporting period | 0 | 0
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | 2,368 | 2,113
Net investment in leases |  |
Dislcosure Detail Of Non Accrual Of Financial Assets [Line Items] |  |
Beginning balance | 16,627 | 17,771
Ending balance | 20,879 | 16,627
Interest income recognized during the reporting period | 0 | 0
Balance not associated allowance for credit losses among financial assets measured at amortized cost, which is suspending recognition of income | ¥ 0 | ¥ 0

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