v3.26.1
Fair value measurements - Fair value of financial instruments measured on recurring basis (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Assets:    
Derivative assets [1] ¥ 25,006,000 ¥ 19,678,000
Netting [2] (22,113,000) (17,711,000)
Collateralized agreements 17,549,895 18,663,585
Other assets 1,598,457 1,124,473
Liabilities:    
Trading liabilities 436
Derivative liabilities [1],[3] 24,150,000 19,342,000
Netting [2],[3] (21,731,000) (17,361,000)
Short-term borrowings 915,584 630,604
Collateralized financing 18,066,278 18,645,860
Long-term borrowings 8,487,521 6,915,178
Recurring [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 23,345,000 20,483,000
Derivative assets [5] 2,893,000 1,967,000
Netting [5] (22,113,000) (17,711,000)
Subtotal, Assets 26,238,000 22,450,000
Loans and receivables [6] 2,834,000 2,243,000
Collateralized agreements [7] 471,000 359,000
Total Assets 31,244,000 [8],[9] 26,282,000
Liabilities:    
Trading liabilities 10,496,000 9,397,000
Derivative liabilities 2,420,000 1,982,000 [5]
Netting (21,731,000) (17,361,000) [5]
Subtotal, Liabilities 12,916,000 11,379,000
Short-term borrowings [10] 916,000 631,000
Payables and deposits [11],[12] 315,000 325,000
Collateralized financing [7] 694,000 704,000
Long-term borrowings [10],[13],[14] 8,487,000 6,915,000
Other liabilities [15] 606,000 462,000
Total Liabilities 23,934,000 20,416,000
Recurring [Member] | Equities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[8] 5,582,000 4,489,000 [9]
Liabilities:    
Trading liabilities 3,472,000 2,776,000
Recurring [Member] | Private equity and debt investments [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[16] 148,000 105,000
Recurring [Member] | Japanese government securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 3,983,000 2,674,000
Liabilities:    
Trading liabilities 2,719,000 2,569,000
Recurring [Member] | Japanese agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 142,000 222,000
Liabilities:    
Trading liabilities 2,000 2,000
Recurring [Member] | Foreign government, agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 7,144,000 6,754,000
Liabilities:    
Trading liabilities 3,949,000 3,582,000
Recurring [Member] | Bank and corporate debt securities and loans for trading purposes [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 2,132,000 1,943,000
Recurring [Member] | Bank and corporate debt securities [Member]    
Liabilities:    
Trading liabilities 220,000 217,000
Recurring [Member] | Commercial mortgage-backed securities ("CMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 9,000 12,000
Recurring [Member] | Residential mortgage-backed securities ("RMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 3,182,000 3,383,000
Liabilities:    
Trading liabilities 0 0
Recurring [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Issued/Guaranteed by government sponsored entity [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 3,021,000 3,204,000
Recurring [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Other [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 161,000 179,000
Recurring [Member] | Real estate-backed securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 527,000 344,000
Recurring [Member] | Collateralized debt obligations ("CDOs") and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[17] 59,000 77,000
Liabilities:    
Trading liabilities [17] 1
Recurring [Member] | Investment trust funds and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 437,000 480,000
Liabilities:    
Trading liabilities 133,000 251,000
Recurring [Member] | Equity contracts [Member]    
Assets:    
Derivative assets [5] 3,053,000 2,572,000
Liabilities:    
Derivative liabilities 3,571,000 3,069,000 [5]
Recurring [Member] | Interest rate contracts [Member]    
Assets:    
Derivative assets [5] 15,806,000 12,428,000
Liabilities:    
Derivative liabilities 14,635,000 11,648,000 [5]
Recurring [Member] | Credit contracts [Member]    
Assets:    
Derivative assets [5] 394,000 304,000
Liabilities:    
Derivative liabilities 559,000 382,000 [5]
Recurring [Member] | Foreign exchange contracts [Member]    
Assets:    
Derivative assets [5] 5,744,000 4,363,000
Liabilities:    
Derivative liabilities 5,349,000 4,194,000 [5]
Recurring [Member] | Other contracts [Member]    
Assets:    
Derivative assets [5] 9,000 11,000
Liabilities:    
Derivative liabilities 37,000 50,000 [5]
Recurring [Member] | Non-trading debt securities [Member]    
Assets:    
Other assets [4],[18] 761,000 485,000
Recurring [Member] | Other [Member]    
Assets:    
Other assets [8],[9] 940,000 745,000
Recurring [Member] | Counterparty and Cash Collateral Netting [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Derivative assets [5],[19] (22,113,000) (17,711,000)
Netting [5],[19] (22,113,000) (17,711,000)
Subtotal, Assets [19] (22,113,000) (17,711,000)
Loans and receivables [6],[19]
Collateralized agreements [7],[19]
Total Assets [19] (22,113,000) [8],[9] (17,711,000)
Liabilities:    
Trading liabilities [19]
Derivative liabilities [19] (21,731,000) (17,361,000) [5]
Netting [19] (21,731,000) (17,361,000) [5]
Subtotal, Liabilities [19] (21,731,000) (17,361,000)
Short-term borrowings [10],[19]
Payables and deposits [11],[12],[19]
Collateralized financing [7],[19]
Long-term borrowings [10],[13],[14],[19]
Other liabilities [15],[19]
Total Liabilities [19] (21,731,000) (17,361,000)
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Equities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[8],[19]
Liabilities:    
Trading liabilities [19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Private equity and debt investments [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[16],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Japanese government securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Liabilities:    
Trading liabilities [19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Japanese agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Liabilities:    
Trading liabilities [19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Foreign government, agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Liabilities:    
Trading liabilities [19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Bank and corporate debt securities and loans for trading purposes [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Bank and corporate debt securities [Member]    
Liabilities:    
Trading liabilities [19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Commercial mortgage-backed securities ("CMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Residential mortgage-backed securities ("RMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Liabilities:    
Trading liabilities [19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Issued/Guaranteed by government sponsored entity [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Other [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Real estate-backed securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Collateralized debt obligations ("CDOs") and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[17],[19]
Liabilities:    
Trading liabilities [17],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Investment trust funds and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[19]
Liabilities:    
Trading liabilities [19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Equity contracts [Member]    
Assets:    
Derivative assets [5],[19]
Liabilities:    
Derivative liabilities [19] [5]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Interest rate contracts [Member]    
Assets:    
Derivative assets [5],[19]
Liabilities:    
Derivative liabilities [19] [5]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Credit contracts [Member]    
Assets:    
Derivative assets [5],[19]
Liabilities:    
Derivative liabilities [19] [5]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Foreign exchange contracts [Member]    
Assets:    
Derivative assets [5],[19]
Liabilities:    
Derivative liabilities [19] [5]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Other contracts [Member]    
Assets:    
Derivative assets [5],[19]
Liabilities:    
Derivative liabilities [19] [5]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Non-trading debt securities [Member]    
Assets:    
Other assets [4],[18],[19]
Recurring [Member] | Counterparty and Cash Collateral Netting [Member] | Other [Member]    
Assets:    
Other assets [8],[9],[19]
Recurring [Member] | Level 1 [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 12,938,000 10,353,000
Derivative assets [5] 1,000 40,000
Netting [5]
Subtotal, Assets 12,939,000 10,393,000
Loans and receivables [6] 6,000
Collateralized agreements [7]
Total Assets 13,660,000 [8],[9] 10,720,000
Liabilities:    
Trading liabilities 8,971,000 8,403,000
Derivative liabilities 29,000 38,000
Netting
Subtotal, Liabilities 9,000,000 8,441,000
Short-term borrowings [10]
Payables and deposits [11],[12]
Collateralized financing [7]
Long-term borrowings [10],[13],[14] 11,000 10,000
Other liabilities [15] 255,000 132,000
Total Liabilities 9,266,000 8,583,000
Recurring [Member] | Level 1 [Member] | Equities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[8] 3,992,000 2,807,000
Liabilities:    
Trading liabilities 3,438,000 2,757,000
Recurring [Member] | Level 1 [Member] | Private equity and debt investments [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[16] 0
Recurring [Member] | Level 1 [Member] | Japanese government securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 3,983,000 2,674,000
Liabilities:    
Trading liabilities 2,719,000 2,569,000
Recurring [Member] | Level 1 [Member] | Japanese agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Liabilities:    
Trading liabilities
Recurring [Member] | Level 1 [Member] | Foreign government, agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 4,591,000 4,402,000
Liabilities:    
Trading liabilities 2,694,000 2,828,000
Recurring [Member] | Level 1 [Member] | Bank and corporate debt securities and loans for trading purposes [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Recurring [Member] | Level 1 [Member] | Bank and corporate debt securities [Member]    
Liabilities:    
Trading liabilities
Recurring [Member] | Level 1 [Member] | Commercial mortgage-backed securities ("CMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Recurring [Member] | Level 1 [Member] | Residential mortgage-backed securities ("RMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Liabilities:    
Trading liabilities
Recurring [Member] | Level 1 [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Issued/Guaranteed by government sponsored entity [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Recurring [Member] | Level 1 [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Other [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Recurring [Member] | Level 1 [Member] | Real estate-backed securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Recurring [Member] | Level 1 [Member] | Collateralized debt obligations ("CDOs") and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[17]
Liabilities:    
Trading liabilities [17]
Recurring [Member] | Level 1 [Member] | Investment trust funds and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 372,000 470,000
Liabilities:    
Trading liabilities 120,000 249,000
Recurring [Member] | Level 1 [Member] | Equity contracts [Member]    
Assets:    
Derivative assets [5] 0 14,000
Liabilities:    
Derivative liabilities 0 5,000
Recurring [Member] | Level 1 [Member] | Interest rate contracts [Member]    
Assets:    
Derivative assets [5] 1,000 22,000
Liabilities:    
Derivative liabilities 24,000 31,000
Recurring [Member] | Level 1 [Member] | Credit contracts [Member]    
Assets:    
Derivative assets [5] 0 1,000
Liabilities:    
Derivative liabilities 3,000 1,000
Recurring [Member] | Level 1 [Member] | Foreign exchange contracts [Member]    
Assets:    
Derivative assets [5] 0 0
Liabilities:    
Derivative liabilities
Recurring [Member] | Level 1 [Member] | Other contracts [Member]    
Assets:    
Derivative assets [5] 0 3,000
Liabilities:    
Derivative liabilities 2,000 1,000
Recurring [Member] | Level 1 [Member] | Non-trading debt securities [Member]    
Assets:    
Other assets [4],[18] 347,000 116,000
Recurring [Member] | Level 1 [Member] | Other [Member]    
Assets:    
Other assets [8],[9] 368,000 211,000
Recurring [Member] | Level 2 [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 10,004,000 9,509,000
Derivative assets [5] 24,710,000 19,422,000
Netting [5]
Subtotal, Assets 34,714,000 28,931,000
Loans and receivables [6] 2,244,000 1,795,000
Collateralized agreements [7] 455,000 344,000
Total Assets 38,043,000 [8],[9] 31,681,000
Liabilities:    
Trading liabilities 1,524,000 993,000
Derivative liabilities 23,758,000 19,043,000
Netting
Subtotal, Liabilities 25,282,000 20,036,000
Short-term borrowings [10] 873,000 595,000
Payables and deposits [11],[12] 303,000 311,000
Collateralized financing [7] 694,000 704,000
Long-term borrowings [10],[13],[14] 8,024,000 6,428,000
Other liabilities [15] 284,000 265,000
Total Liabilities 35,460,000 28,339,000
Recurring [Member] | Level 2 [Member] | Equities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[8] 1,576,000 1,661,000
Liabilities:    
Trading liabilities 34,000 18,000
Recurring [Member] | Level 2 [Member] | Private equity and debt investments [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[16] 2,000 2,000
Recurring [Member] | Level 2 [Member] | Japanese government securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Liabilities:    
Trading liabilities
Recurring [Member] | Level 2 [Member] | Japanese agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 142,000 222,000
Liabilities:    
Trading liabilities 2,000 2,000
Recurring [Member] | Level 2 [Member] | Foreign government, agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 2,549,000 2,346,000
Liabilities:    
Trading liabilities 1,255,000 754,000
Recurring [Member] | Level 2 [Member] | Bank and corporate debt securities and loans for trading purposes [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 2,028,000 1,762,000
Recurring [Member] | Level 2 [Member] | Bank and corporate debt securities [Member]    
Liabilities:    
Trading liabilities 220,000 217,000
Recurring [Member] | Level 2 [Member] | Commercial mortgage-backed securities ("CMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 9,000 2,000
Recurring [Member] | Level 2 [Member] | Residential mortgage-backed securities ("RMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 3,172,000 3,335,000
Liabilities:    
Trading liabilities 0 0
Recurring [Member] | Level 2 [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Issued/Guaranteed by government sponsored entity [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 3,021,000 3,204,000
Recurring [Member] | Level 2 [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Other [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 151,000 131,000
Recurring [Member] | Level 2 [Member] | Real estate-backed securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 445,000 137,000
Recurring [Member] | Level 2 [Member] | Collateralized debt obligations ("CDOs") and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[17] 25,000 35,000
Liabilities:    
Trading liabilities [17] 0
Recurring [Member] | Level 2 [Member] | Investment trust funds and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 56,000 7,000
Liabilities:    
Trading liabilities 13,000 2,000
Recurring [Member] | Level 2 [Member] | Equity contracts [Member]    
Assets:    
Derivative assets [5] 3,016,000 2,541,000
Liabilities:    
Derivative liabilities 3,561,000 3,048,000
Recurring [Member] | Level 2 [Member] | Interest rate contracts [Member]    
Assets:    
Derivative assets [5] 15,686,000 12,306,000
Liabilities:    
Derivative liabilities 14,476,000 11,523,000
Recurring [Member] | Level 2 [Member] | Credit contracts [Member]    
Assets:    
Derivative assets [5] 296,000 240,000
Liabilities:    
Derivative liabilities 402,000 282,000
Recurring [Member] | Level 2 [Member] | Foreign exchange contracts [Member]    
Assets:    
Derivative assets [5] 5,709,000 4,330,000
Liabilities:    
Derivative liabilities 5,292,000 4,148,000
Recurring [Member] | Level 2 [Member] | Other contracts [Member]    
Assets:    
Derivative assets [5] 3,000 5,000
Liabilities:    
Derivative liabilities 27,000 42,000
Recurring [Member] | Level 2 [Member] | Non-trading debt securities [Member]    
Assets:    
Other assets [4],[18] 366,000 352,000
Recurring [Member] | Level 2 [Member] | Other [Member]    
Assets:    
Other assets [8],[9] 264,000 259,000
Recurring [Member] | Level 3 [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 403,000 621,000
Derivative assets [5] 295,000 216,000
Netting [5]
Subtotal, Assets 698,000 837,000
Loans and receivables [6] 584,000 448,000
Collateralized agreements [7] 16,000 15,000
Total Assets 1,654,000 [8],[9] 1,592,000
Liabilities:    
Trading liabilities 1,000 1,000
Derivative liabilities 364,000 262,000
Netting
Subtotal, Liabilities 365,000 263,000
Short-term borrowings [10] 43,000 36,000
Payables and deposits [11],[12] 12,000 14,000
Collateralized financing [7]
Long-term borrowings [10],[13],[14] 452,000 477,000
Other liabilities [15] 67,000 65,000
Total Liabilities 939,000 855,000
Recurring [Member] | Level 3 [Member] | Equities [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[8] 14,000 21,000
Liabilities:    
Trading liabilities 0 1,000
Recurring [Member] | Level 3 [Member] | Private equity and debt investments [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[16] 146,000 103,000
Recurring [Member] | Level 3 [Member] | Japanese government securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Liabilities:    
Trading liabilities
Recurring [Member] | Level 3 [Member] | Japanese agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 0
Liabilities:    
Trading liabilities
Recurring [Member] | Level 3 [Member] | Foreign government, agency and municipal securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 4,000 6,000
Liabilities:    
Trading liabilities
Recurring [Member] | Level 3 [Member] | Bank and corporate debt securities and loans for trading purposes [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 104,000 181,000
Recurring [Member] | Level 3 [Member] | Bank and corporate debt securities [Member]    
Liabilities:    
Trading liabilities 0 0
Recurring [Member] | Level 3 [Member] | Commercial mortgage-backed securities ("CMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 0 10,000
Recurring [Member] | Level 3 [Member] | Residential mortgage-backed securities ("RMBS") [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 10,000 48,000
Liabilities:    
Trading liabilities
Recurring [Member] | Level 3 [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Issued/Guaranteed by government sponsored entity [Member]    
Assets:    
Trading assets and private equity and debt investments [4]
Recurring [Member] | Level 3 [Member] | Residential mortgage-backed securities ("RMBS") [Member] | Other [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 10,000 48,000
Recurring [Member] | Level 3 [Member] | Real estate-backed securities [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 82,000 207,000
Recurring [Member] | Level 3 [Member] | Collateralized debt obligations ("CDOs") and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4],[17] 34,000 42,000
Liabilities:    
Trading liabilities [17] 1
Recurring [Member] | Level 3 [Member] | Investment trust funds and other [Member]    
Assets:    
Trading assets and private equity and debt investments [4] 9,000 3,000
Liabilities:    
Trading liabilities 0
Recurring [Member] | Level 3 [Member] | Equity contracts [Member]    
Assets:    
Derivative assets [5] 37,000 17,000
Liabilities:    
Derivative liabilities 10,000 16,000
Recurring [Member] | Level 3 [Member] | Interest rate contracts [Member]    
Assets:    
Derivative assets [5] 119,000 100,000
Liabilities:    
Derivative liabilities 135,000 94,000
Recurring [Member] | Level 3 [Member] | Credit contracts [Member]    
Assets:    
Derivative assets [5] 98,000 63,000
Liabilities:    
Derivative liabilities 154,000 99,000
Recurring [Member] | Level 3 [Member] | Foreign exchange contracts [Member]    
Assets:    
Derivative assets [5] 35,000 33,000
Liabilities:    
Derivative liabilities 57,000 46,000
Recurring [Member] | Level 3 [Member] | Other contracts [Member]    
Assets:    
Derivative assets [5] 6,000 3,000
Liabilities:    
Derivative liabilities 8,000 7,000
Recurring [Member] | Level 3 [Member] | Non-trading debt securities [Member]    
Assets:    
Other assets [4],[18] 48,000 17,000
Recurring [Member] | Level 3 [Member] | Other [Member]    
Assets:    
Other assets [8],[9] ¥ 308,000 ¥ 275,000
[1] The amounts reported include derivatives used for non-trading purposes other than those designated as formal fair value or net investment accounting hedges. These amounts have not been separately presented since such amounts were not significant as of March 31, 2025 and March 31, 2026.
[2] Represents amounts offset through counterparty offsetting of derivative assets and liabilities as well as cash collateral offsetting against net derivatives under master netting and similar agreements for which Nomura has obtained sufficient evidence of enforceability in accordance with ASC 210-20 and ASC 815. As of March 31, 2025, Nomura offset a total of ¥1,740 billion of cash collateral receivables against net derivative liabilities and ¥2,090 billion of cash collateral payables against net derivative assets. As of March 31, 2026, Nomura offset a total of ¥2,035 billion of cash collateral receivables against net derivative liabilities and ¥2,416 billion of cash collateral payables against net derivative assets.
[3] Includes the amount of embedded derivatives bifurcated in accordance with ASC 815.
[4] Investments that are carried at fair value using NAV per share as a practical expedient have not been classified in the fair value hierarchy. As of March 31, 2025 and March 31, 2026, the fair values of these investments which are included in Trading assets and private equity and debt investments were ¥73 billion and ¥104 billion, respectively. As of March 31, 2025 and March 31, 2026, the fair values of these investments which are included in Other assets were ¥3 billion and ¥15 billion, respectively.
[5] Derivatives which contain multiple types of risk are classified based on the primary risk type of the instrument.
[6] Includes loans and receivables for which the fair value option has been elected.
[7] Includes collateralized agreements or collateralized financing for which the FVO has been elected.
[8] Includes equity investments that would have been accounted for under the equity method had Nomura not chosen to elect the FVO.
[9] Includes equity investments which comprise listed and unlisted equity securities held for operating purposes in the amounts of ¥72,184 million and ¥26,217 million, respectively, as of March 31, 2025 and ¥97,173 million and ¥26,018 million, respectively, as of March 31, 2026.
[10] Includes structured notes for which the FVO has been elected.
[11] Includes deposits received at banks for which the FVO has been elected.
[12] Includes embedded derivatives bifurcated from deposits received at banks. Deposits are adjusted for fair value changes in corresponding embedded derivatives for presentation in the consolidated balance sheets.
[13] Includes embedded derivatives bifurcated from issued structured notes. Structured notes are adjusted for fair value changes in corresponding embedded derivatives for presentation in the consolidated balance sheets
[14] Includes liabilities recognized from secured financing transactions that are accounted for as financings rather than sales. Nomura elected the fair value option for these liabilities.
[15] Includes loan commitments for which the FVO has been elected.
[16] Private equity and debt investments include minority private equity and venture capital equity investments and other junior debt investments such as mezzanine debt held for non-trading purposes, and post-IPO investments. These investments also include equity investments that would have been accounted for under the equity method had Nomura not chosen to elect the FVO.
[17] Includes collateralized loan obligations (“CLOs”) and asset-backed securities (“ABS”) such as those secured on credit card loans, auto loans and student loans.
[18] Includes non-trading debt securities for which the FVO has been elected and AFS debt securities.
[19] Represents the amount offset under counterparty netting of derivative assets and liabilities as well as cash collateral netting against net derivatives assets or liabilities.