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Securitizations and Variable Interest Entities (Tables)
6 Months Ended
Sep. 30, 2025
Securitizations and Variable Interest Entities [Abstract]  
Fair value of retained interests
The following tables present the fair value of retained interests which Nomura has continuing involvement in SPEs and their classification in the fair value hierarchy, categorized by the type of transferred assets.
 
    
Billions of yen
 
    
March 31, 2025
 
    
Level 1
    
Level 2
    
Level 3
    
Total
    
Investment

grade
    
Other
 
Government, agency and municipal securities
   ¥ —       ¥ 241      ¥ —       ¥ 241      ¥ 241      ¥ —   
Bank and corporate debt securities
     —         —         —         —         —         —   
CMBS and RMBS
     —         —         9        9        2        7  
  
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
   ¥ —       ¥ 241      ¥ 9      ¥ 250      ¥ 243      ¥ 7  
  
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
 
    
Billions of yen
 
    
September 30, 2025
 
    
Level 1
    
Level 2
    
Level 3
    
Total
    
Investment

grade
    
Other
 
Government, agency and municipal securities
   ¥ —       ¥ 180      ¥ —       ¥ 180      ¥ 180      ¥ —   
Bank and corporate debt securities
     —         —         —         —         —         —   
CMBS and RMBS
     —         —         10        10        —         10  
  
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Total
   ¥ —       ¥ 180      ¥ 10      ¥ 190      ¥ 180      ¥ 10  
  
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
 
Type and carrying value of financial assets
    
Billions of yen
 
    
March 31, 2025
    
September 30, 2025
 
Assets
     
Trading assets
     
Japanese government securities
   ¥ 1      ¥ 1  
Loans for trading purposes
     66        155  
Loans receivable
     481        397  
  
 
 
    
 
 
 
Total
   ¥ 548      ¥ 553  
  
 
 
    
 
 
 
Liabilities
     
Borrowings
   ¥    548      ¥    553  
  
 
 
    
 
 
 
Classification of consolidated VIEs' assets and liabilities
    
Billions of yen
 
    
March 31, 2025
    
September 30, 2025
 
Consolidated VIE assets
     
Cash and cash equivalents
   ¥ 14      ¥ 21  
Trading assets
     
Equities
     527        555  
Debt securities
     643        635  
CMBS and RMBS
     64        47  
Derivatives
     1        1  
Private equity and debt investments
     83        131  
Office buildings, land, equipment and facilities
     3        13  
Other
     236        304  
  
 
 
    
 
 
 
Total
   ¥    1,571      ¥    1,707  
  
 
 
    
 
 
 
Consolidated VIE liabilities
     
Trading liabilities
     
Derivatives
   ¥ 0      ¥ 1  
Borrowings
     
Short-term borrowings
     112        87  
Long-term borrowings
     935        902  
Other
     156        191  
  
 
 
    
 
 
 
Total
   ¥ 1,203      ¥ 1,181  
  
 
 
    
 
 
 
Carrying amount of assets and liabilities of unconsolidated VIEs
    
Billions of yen
 
    
March 31, 2025
 
    
Carrying amount of

variable interests
    
Maximum exposure

to loss to

unconsolidated VIEs
 
    
Assets
    
Liabilities
 
Trading assets and liabilities
        
Equities
   ¥ 23      ¥  —       ¥ 23  
Debt securities
     80         —         80  
CMBS and RMBS
     3,288         —         3,288  
Investment trust funds and other
     129         —         129  
Private equity and debt investments
     23         —         23  
Loans
     1,712         —         1,712  
Other
     23         —         23  
Commitments to extend credit and other guarantees
      —          —         167  
  
 
 
    
 
 
    
 
 
 
Total
   ¥ 5,278      ¥  —       ¥ 5,445  
  
 
 
    
 
 
    
 
 
 
    
Billions of yen
 
    
September 30, 2025
 
    
Carrying amount of

variable interests
    
Maximum exposure

to loss to

unconsolidated VIEs
 
    
Assets
    
Liabilities
 
Trading assets and liabilities
        
Equities
   ¥ 23      ¥  —       ¥ 23  
Debt securities
     72         —         72  
CMBS and RMBS
     3,035         —         3,035  
Investment trust funds and other
     143         —         143  
Private equity and debt investments
     24         —         24  
Loans
     1,711         —         1,711  
Other
     30         —         30  
Commitments to extend credit and other guarantees
      —          —         214  
  
 
 
    
 
 
    
 
 
 
Total
   ¥ 5,038      ¥  —       ¥ 5,252