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Fair value measurements - Schedule of movements in Level 3 financial instruments (Detail) - JPY (¥)
¥ in Billions
 3 Months Ended 6 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Assets [Abstract]        
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Revenues Revenues Revenues Revenues
Liabilities [Abstract]        
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Revenues Revenues Revenues Revenues
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax
Recurring [Member] | Level 3 [Member]        
Assets [Abstract]        
Beginning balance, Assets ¥ 900 ¥ 909 ¥ 868 ¥ 792
Total gains (losses) recognized in net revenue, Assets [1] (4) 6 (7) 4
Total gains (losses) recognized in other comprehensive income, Assets 0 0 0 0
Purchases/ issues, Assets [2] 380 146 536 331
Sales/ redemptions, Assets [2] (344) (185) (492) (346)
Settlements, Assets 8 (18) 8 (5)
Foreign exchange movements, Assets 21 36 82 102
Transfers into Level 3, Assets [3],[4] 88 42 94 104
Transfers out of Level 3, Assets [4] (35) (8) (75) (54)
Ending balance, Assets 1,014 928 1,014 928
Liabilities [Abstract]        
Beginning balance, Liabilities 483 534 565 580
Total gains (losses) recognized in net revenue, Liabilities [1] 14 (3) (1) 23
Total gains (losses) recognized in other comprehensive income, Liabilities 0 2 (2) 3
Purchases/ issues, Liabilities [2] 97 50 182 168
Sales/ redemptions, Liabilities [2] (22) (40) (123) (105)
Settlements, Liabilities
Foreign exchange movements, Liabilities 3 4 10 8
Transfers into Level 3, Liabilities [3],[4] 45 21 55 54
Transfers out of Level 3, Liabilities [4] (20) (77) (120) (186)
Ending balance, Liabilities 572 493 572 493
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member]        
Assets [Abstract]        
Beginning balance, Assets 443 469 457 398
Total gains (losses) recognized in net revenue, Assets [1] 3 1 3 (13)
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 361 128 457 305
Sales/ redemptions, Assets [2] (318) (164) (433) (293)
Settlements, Assets
Foreign exchange movements, Assets 9 20 36 49
Transfers into Level 3, Assets [3],[4] 36 34 53 57
Transfers out of Level 3, Assets [4] (2) (10) (41) (25)
Ending balance, Assets 532 478 532 478
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Equities [Member]        
Assets [Abstract]        
Beginning balance, Assets 5 19 4 14
Total gains (losses) recognized in net revenue, Assets [1] (1) 2 0 0
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 22 1 22 7
Sales/ redemptions, Assets [2] 0 (2) (1) (2)
Settlements, Assets
Foreign exchange movements, Assets 0 1 1 2
Transfers into Level 3, Assets [3],[4] 2 1 2 1
Transfers out of Level 3, Assets [4] 0 (6) 0 (6)
Ending balance, Assets 28 16 28 16
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Private equity and debt investments [Member]        
Assets [Abstract]        
Beginning balance, Assets 61 32 52 32
Total gains (losses) recognized in net revenue, Assets [1] 3 3 8 2
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 9 5 12 7
Sales/ redemptions, Assets [2] 0 (1) 0 (2)
Settlements, Assets
Foreign exchange movements, Assets 0 0 1 0
Transfers into Level 3, Assets [3],[4]
Transfers out of Level 3, Assets [4]
Ending balance, Assets 73 39 73 39
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Japanese agency and municipal securities [Member]        
Assets [Abstract]        
Beginning balance, Assets 0 2 2 2
Total gains (losses) recognized in net revenue, Assets [1] 0 0
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2]
Sales/ redemptions, Assets [2] 0 0 0 0
Settlements, Assets
Foreign exchange movements, Assets
Transfers into Level 3, Assets [3],[4]
Transfers out of Level 3, Assets [4] (2)
Ending balance, Assets 0 2 0 2
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Foreign government, agency and municipal securities [Member]        
Assets [Abstract]        
Beginning balance, Assets 3 12 8 10
Total gains (losses) recognized in net revenue, Assets [1] 0 0 1 2
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 1 2 3 7
Sales/ redemptions, Assets [2] (2) (3) (6) (8)
Settlements, Assets
Foreign exchange movements, Assets 0 0 0 0
Transfers into Level 3, Assets [3],[4] 0 0 0 0
Transfers out of Level 3, Assets [4] 0 (1) (4) (1)
Ending balance, Assets 2 10 2 10
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Bank and corporate debt securities and loans for trading purposes [Member]        
Assets [Abstract]        
Beginning balance, Assets 230 260 258 220
Total gains (losses) recognized in net revenue, Assets [1] 2 (3) (2) (1)
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 196 72 230 157
Sales/ redemptions, Assets [2] (209) (98) (263) (168)
Settlements, Assets
Foreign exchange movements, Assets 5 11 20 27
Transfers into Level 3, Assets [3],[4] 27 33 38 55
Transfers out of Level 3, Assets [4] (1) (3) (31) (18)
Ending balance, Assets 250 272 250 272
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Commercial mortgage-backed securities ("CMBS") [Member]        
Assets [Abstract]        
Beginning balance, Assets 0 7 0 7
Total gains (losses) recognized in net revenue, Assets [1] 0 0 0 0
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 0 0 0
Sales/ redemptions, Assets [2] 0 0 0 0
Settlements, Assets
Foreign exchange movements, Assets
Transfers into Level 3, Assets [3],[4] 0 0
Transfers out of Level 3, Assets [4]
Ending balance, Assets 0 7 0 7
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Residential mortgage-backed securities ("RMBS") [Member]        
Assets [Abstract]        
Beginning balance, Assets 10 9 8 8
Total gains (losses) recognized in net revenue, Assets [1] 0 0 0 (1)
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 0 0 2 0
Sales/ redemptions, Assets [2] 0 (1) 0 (1)
Settlements, Assets
Foreign exchange movements, Assets 0 1 1 2
Transfers into Level 3, Assets [3],[4] 1
Transfers out of Level 3, Assets [4] 0 (1)
Ending balance, Assets 10 9 10 9
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Real estate-backed securities [Member]        
Assets [Abstract]        
Beginning balance, Assets 106 105 95 79
Total gains (losses) recognized in net revenue, Assets [1] 0 (3) (2) (13)
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 71 36 104 98
Sales/ redemptions, Assets [2] (39) (41) (67) (75)
Settlements, Assets
Foreign exchange movements, Assets 3 6 11 14
Transfers into Level 3, Assets [3],[4]
Transfers out of Level 3, Assets [4]
Ending balance, Assets 141 103 141 103
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Collateralized debt obligations ("CDOs") and other [Member]        
Assets [Abstract]        
Beginning balance, Assets 26 23 28 26
Total gains (losses) recognized in net revenue, Assets [1] (1) 2 (2) (2)
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 32 12 52 29
Sales/ redemptions, Assets [2] (37) (18) (63) (37)
Settlements, Assets
Foreign exchange movements, Assets 1 1 2 4
Transfers into Level 3, Assets [3],[4] 7 0 13 0
Transfers out of Level 3, Assets [4] (1) (3)
Ending balance, Assets 27 20 27 20
Recurring [Member] | Level 3 [Member] | Trading assets and private equity and debt investments [Member] | Investment trust funds and other [Member]        
Assets [Abstract]        
Beginning balance, Assets 2 0 2 0
Total gains (losses) recognized in net revenue, Assets [1] 0 0 0 0
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 30 0 32 0
Sales/ redemptions, Assets [2] (31) 0 (33) 0
Settlements, Assets
Foreign exchange movements, Assets 0 0 0 0
Transfers into Level 3, Assets [3],[4] 0 0
Transfers out of Level 3, Assets [4] 0 0
Ending balance, Assets 1 0 1 0
Recurring [Member] | Level 3 [Member] | Equity contracts [Member]        
Assets [Abstract]        
Beginning balance, Assets 2 26 [5] 6 [5] 10 [5]
Total gains (losses) recognized in net revenue, Assets 1 (2) [1],[5] (1) [1],[5] 12 [1],[5]
Total gains (losses) recognized in other comprehensive income, Assets [5] [5] [5]
Purchases/ issues, Assets [2],[5]
Sales/ redemptions, Assets [2],[5]
Settlements, Assets 0 (27) [5] (4) [5] (25) [5]
Foreign exchange movements, Assets 0 (2) [5] 1 [5] (3) [5]
Transfers into Level 3, Assets [3],[4],[5] 1 (5) 2 (1)
Transfers out of Level 3, Assets [4],[5] 2 5 2 2
Ending balance, Assets [5] 6 (5) 6 (5)
Recurring [Member] | Level 3 [Member] | Interest rate contracts [Member]        
Assets [Abstract]        
Beginning balance, Assets 2 20 [5] 11 [5] (11) [5]
Total gains (losses) recognized in net revenue, Assets (11) 20 [1],[5] (8) [1],[5] 22 [1],[5]
Total gains (losses) recognized in other comprehensive income, Assets [5] [5] [5]
Purchases/ issues, Assets [2],[5]
Sales/ redemptions, Assets [2],[5] (1) 0 0 0
Settlements, Assets 3 0 [5] 12 [5] 17 [5]
Foreign exchange movements, Assets 0 (1) [5] 0 [5] 0 [5]
Transfers into Level 3, Assets [3],[4],[5] 0 (2) (22) 11
Transfers out of Level 3, Assets [4],[5] (1) (2) (1) (4)
Ending balance, Assets [5] (8) 35 (8) 35
Recurring [Member] | Level 3 [Member] | Credit contracts [Member]        
Assets [Abstract]        
Beginning balance, Assets (39) (30) [5] (32) [5] (33) [5]
Total gains (losses) recognized in net revenue, Assets (1) (5) [1],[5] (4) [1],[5] 12 [1],[5]
Total gains (losses) recognized in other comprehensive income, Assets [5] [5] [5]
Purchases/ issues, Assets [2],[5]
Sales/ redemptions, Assets [2],[5]
Settlements, Assets 0 4 [5] (2) [5] (6) [5]
Foreign exchange movements, Assets (1) 0 [5] (3) [5] (4) [5]
Transfers into Level 3, Assets [3],[4],[5] 1 (2) 1 (2)
Transfers out of Level 3, Assets [4],[5] (2) 0 (2) 0
Ending balance, Assets [5] (42) (33) (42) (33)
Recurring [Member] | Level 3 [Member] | Foreign exchange contracts [Member]        
Assets [Abstract]        
Beginning balance, Assets 14 18 [5] 19 [5] 10 [5]
Total gains (losses) recognized in net revenue, Assets 0 (1) [1],[5] (3) [1],[5] 0 [1],[5]
Total gains (losses) recognized in other comprehensive income, Assets [5] [5] [5]
Purchases/ issues, Assets [2],[5]
Sales/ redemptions, Assets [2],[5]
Settlements, Assets 5 5 [5] 2 [5] 9 [5]
Foreign exchange movements, Assets 0 0 [5] 2 [5] 2 [5]
Transfers into Level 3, Assets [3],[4],[5] 0 0 (1) 0
Transfers out of Level 3, Assets [4],[5] 0 (1) 0 0
Ending balance, Assets [5] 19 21 19 21
Recurring [Member] | Level 3 [Member] | Derivatives, net [Member]        
Assets [Abstract]        
Beginning balance, Assets (21) 34 [5] 4 [5] (24) [5]
Total gains (losses) recognized in net revenue, Assets [1] (11) 12 [5] (16) [5] 46 [5]
Total gains (losses) recognized in other comprehensive income, Assets [5] [5] [5]
Purchases/ issues, Assets [2],[5]
Sales/ redemptions, Assets [2],[5] (1) 0 0 0
Settlements, Assets 8 (18) [5] 8 [5] (5) [5]
Foreign exchange movements, Assets (1) (3) [5] 0 [5] (5) [5]
Transfers into Level 3, Assets [3],[4],[5] 2 (9) (20) 8
Transfers out of Level 3, Assets [4],[5] (1) 2 (1) (2)
Ending balance, Assets [5] (25) 18 (25) 18
Recurring [Member] | Level 3 [Member] | Subtotal [Member]        
Assets [Abstract]        
Beginning balance, Assets 422 503 461 374
Total gains (losses) recognized in net revenue, Assets [1] (8) 13 (13) 33
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 361 128 457 305
Sales/ redemptions, Assets [2] (319) (164) (433) (293)
Settlements, Assets 8 (18) 8 (5)
Foreign exchange movements, Assets 8 17 36 44
Transfers into Level 3, Assets [3],[4] 38 25 33 65
Transfers out of Level 3, Assets [4] (3) (8) (42) (27)
Ending balance, Assets 507 496 507 496
Recurring [Member] | Level 3 [Member] | Loans and receivables [Member]        
Assets [Abstract]        
Beginning balance, Assets 248 196 191 205
Total gains (losses) recognized in net revenue, Assets [1] 4 3 9 5
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 19 18 74 25
Sales/ redemptions, Assets [2] (20) (21) (49) (52)
Settlements, Assets
Foreign exchange movements, Assets 7 9 23 29
Transfers into Level 3, Assets [3],[4] 30 16 41 36
Transfers out of Level 3, Assets [4] (32) (33) (27)
Ending balance, Assets 256 221 256 221
Recurring [Member] | Level 3 [Member] | Collateralized agreements [Member]        
Assets [Abstract]        
Beginning balance, Assets 16 18 17 16
Total gains (losses) recognized in net revenue, Assets [1] 0 0 0 0
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2]
Sales/ redemptions, Assets [2] (4) (8)
Settlements, Assets
Foreign exchange movements, Assets 0 1 3 3
Transfers into Level 3, Assets [3],[4]
Transfers out of Level 3, Assets [4]
Ending balance, Assets 12 19 12 19
Recurring [Member] | Level 3 [Member] | Non-trading debt securities [Member]        
Assets [Abstract]        
Beginning balance, Assets 3 3 3
Total gains (losses) recognized in net revenue, Assets [1] 0 0 0 0
Total gains (losses) recognized in other comprehensive income, Assets
Purchases/ issues, Assets [2] 0 0
Sales/ redemptions, Assets [2] 0
Settlements, Assets
Foreign exchange movements, Assets 0 0 0 1
Transfers into Level 3, Assets [3],[4] 20 20 2
Transfers out of Level 3, Assets [4]
Ending balance, Assets 23 3 23 3
Recurring [Member] | Level 3 [Member] | Other [Member]        
Assets [Abstract]        
Beginning balance, Assets 211 189 196 [6] 197
Total gains (losses) recognized in net revenue, Assets [1] 0 (10) (3) (34)
Total gains (losses) recognized in other comprehensive income, Assets 0 0 0 0
Purchases/ issues, Assets [2] 0 0 5 1
Sales/ redemptions, Assets [2] (1) 0 (2) (1)
Settlements, Assets
Foreign exchange movements, Assets 6 9 20 25
Transfers into Level 3, Assets [3],[4] 1 1
Transfers out of Level 3, Assets [4]
Ending balance, Assets 216 [6] 189 216 [6] 189
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 8 6 4 3
Total gains (losses) recognized in net revenue, Liabilities [1] 0 0 0 0
Total gains (losses) recognized in other comprehensive income, Liabilities
Purchases/ issues, Liabilities [2] 1 0 10 2
Sales/ redemptions, Liabilities [2] (4) (3) (10) (5)
Settlements, Liabilities
Foreign exchange movements, Liabilities 0 0 0 0
Transfers into Level 3, Liabilities [3],[4] 2 2 4 5
Transfers out of Level 3, Liabilities [4] (2) 0 (3) 0
Ending balance, Liabilities 5 5 5 5
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member] | Equities [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 3 1 1 0
Total gains (losses) recognized in net revenue, Liabilities [1] 0 0 (2) 0
Total gains (losses) recognized in other comprehensive income, Liabilities
Purchases/ issues, Liabilities [2] 6 0
Sales/ redemptions, Liabilities [2] (2) 0 (8) (1)
Settlements, Liabilities
Foreign exchange movements, Liabilities 0 0 0 0
Transfers into Level 3, Liabilities [3],[4] 0 0 2
Transfers out of Level 3, Liabilities [4] (1) (1)
Ending balance, Liabilities 0 1 0 1
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member] | Private equity and debt investments [Member]        
Liabilities [Abstract]        
Total gains (losses) recognized in other comprehensive income, Liabilities      
Purchases/ issues, Liabilities [2]      
Settlements, Liabilities      
Transfers into Level 3, Liabilities [3],[4]      
Transfers out of Level 3, Liabilities [4]      
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member] | Foreign government, agency and municipal securities [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 0 0 0 0
Total gains (losses) recognized in net revenue, Liabilities [1] 0 0 0 0
Total gains (losses) recognized in other comprehensive income, Liabilities  
Purchases/ issues, Liabilities [2]  
Sales/ redemptions, Liabilities [2] 0 0 0
Settlements, Liabilities  
Foreign exchange movements, Liabilities 0 0 0 0
Transfers into Level 3, Liabilities [3],[4]  
Transfers out of Level 3, Liabilities [4]  
Ending balance, Liabilities 0 0 0 0
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member] | Bank and corporate debt securities [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 5 5 3 3
Total gains (losses) recognized in net revenue, Liabilities [1] 0 0 2 0
Total gains (losses) recognized in other comprehensive income, Liabilities
Purchases/ issues, Liabilities [2] 1 0 4 1
Sales/ redemptions, Liabilities [2] (2) (3) (2) (3)
Settlements, Liabilities
Foreign exchange movements, Liabilities 0 0 0 0
Transfers into Level 3, Liabilities [3],[4] 2 2 4 3
Transfers out of Level 3, Liabilities [4] (1) 0 (2) 0
Ending balance, Liabilities 5 4 5 4
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member] | Commercial mortgage-backed securities ("CMBS") [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities      
Total gains (losses) recognized in net revenue, Liabilities [1]      
Total gains (losses) recognized in other comprehensive income, Liabilities      
Sales/ redemptions, Liabilities [2]      
Settlements, Liabilities      
Foreign exchange movements, Liabilities      
Transfers into Level 3, Liabilities [3],[4]      
Transfers out of Level 3, Liabilities [4]      
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member] | Collateralized debt obligations ("CDOs") and other [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 0   0
Total gains (losses) recognized in net revenue, Liabilities [1]  
Total gains (losses) recognized in other comprehensive income, Liabilities  
Purchases/ issues, Liabilities [2] 0 0 1
Sales/ redemptions, Liabilities [2] 0   (1)
Settlements, Liabilities  
Foreign exchange movements, Liabilities   0
Transfers into Level 3, Liabilities [3],[4]  
Transfers out of Level 3, Liabilities [4]  
Ending balance, Liabilities 0 0
Recurring [Member] | Level 3 [Member] | Trading liabilities [Member] | Investment trust funds and other [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 0 0 0 0
Total gains (losses) recognized in net revenue, Liabilities [1] 0 0
Total gains (losses) recognized in other comprehensive income, Liabilities
Purchases/ issues, Liabilities [2]
Sales/ redemptions, Liabilities [2] 0 0 0 0
Settlements, Liabilities
Foreign exchange movements, Liabilities 0 0 0 0
Transfers into Level 3, Liabilities [3],[4]
Transfers out of Level 3, Liabilities [4]
Ending balance, Liabilities 0 0 0 0
Recurring [Member] | Level 3 [Member] | Short-term borrowings [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 30 35 30 58
Total gains (losses) recognized in net revenue, Liabilities [1] 0 (2) (1) 0
Total gains (losses) recognized in other comprehensive income, Liabilities 0 0 0 0
Purchases/ issues, Liabilities [2] 13 9 32 26
Sales/ redemptions, Liabilities [2] (3) (10) (15) (16)
Settlements, Liabilities
Foreign exchange movements, Liabilities 1 0 1 0
Transfers into Level 3, Liabilities [3],[4] 4 3 4 4
Transfers out of Level 3, Liabilities [4] (10) (8) (43)
Ending balance, Liabilities 45 29 45 29
Recurring [Member] | Level 3 [Member] | Payables and deposits [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 22 25 17 8
Total gains (losses) recognized in net revenue, Liabilities [1] 1 0 1 1
Total gains (losses) recognized in other comprehensive income, Liabilities 0 0 0 0
Purchases/ issues, Liabilities [2] 1 4 3 15
Sales/ redemptions, Liabilities [2]
Settlements, Liabilities
Foreign exchange movements, Liabilities
Transfers into Level 3, Liabilities [3],[4] 3 7
Transfers out of Level 3, Liabilities [4] (6) (8) (6) (8)
Ending balance, Liabilities 16 21 16 21
Recurring [Member] | Level 3 [Member] | Long-term borrowings [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 393 442 493 479
Total gains (losses) recognized in net revenue, Liabilities [1] 13 0 (6) 13
Total gains (losses) recognized in other comprehensive income, Liabilities 0 2 (2) 3
Purchases/ issues, Liabilities [2] 79 37 119 122
Sales/ redemptions, Liabilities [2] (15) (22) (96) (77)
Settlements, Liabilities
Foreign exchange movements, Liabilities 1 2 7 3
Transfers into Level 3, Liabilities [3],[4] 39 16 44 38
Transfers out of Level 3, Liabilities [4] (12) (58) (103) (134)
Ending balance, Liabilities 472 415 472 415
Recurring [Member] | Level 3 [Member] | Other liabilities [Member]        
Liabilities [Abstract]        
Beginning balance, Liabilities 30 26 21 32
Total gains (losses) recognized in net revenue, Liabilities [1] 0 (1) 5 9
Total gains (losses) recognized in other comprehensive income, Liabilities
Purchases/ issues, Liabilities [2] 3 0 18 3
Sales/ redemptions, Liabilities [2] 0 (5) (2) (7)
Settlements, Liabilities
Foreign exchange movements, Liabilities 1 2 2 5
Transfers into Level 3, Liabilities [3],[4] 0 0 0 0
Transfers out of Level 3, Liabilities [4] (1) 0 (1)
Ending balance, Liabilities ¥ 34 ¥ 23 ¥ 34 ¥ 23
[1] Includes gains and losses reported primarily within Net gain on trading, Gain (loss) on private equity and debt investments, and also within Gain (loss) on investments in equity securities, Revenue—Other and Non-interest expenses—Other, Interest and dividends and Interest expense in the consolidated statements of income.
[2] Amounts reported in Purchases / issues include increases in trading liabilities while Sales / redemptions include decreases in trading liabilities.
[3] Amounts of gains and losses on these transfers which were recognized in the period when the Transfers into Level 3 occurred were not significant for the six and three months ended September 30, 2022 and 2023.
[4] Transfers into Level 3 indicate certain valuation inputs of a financial instrument become unobservable or significant. Transfers out of Level 3 indicate certain valuation inputs of a financial instrument become observable or insignificant. See “Quantitative and qualitative information regarding significant unobservable valuation inputs” above for the valuation inputs of each financial instruments.
[5] Derivatives which contain multiple types of risk are classified based on the primary risk type of the instrument.
[6] Valuation techniques and unobservable valuation inputs in respect of equity securities reported within Other assets in the consolidated balance sheets.