v3.26.1
Estimated Fair Value of Financial Instruments (Information about Carrying Amount of Financial Instruments Reported in Consolidated Balance Sheets and Related Market or Fair Value) (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Assets:    
Cash and cash equivalents ¥ 1,334,945 ¥ 1,206,573
Restricted Cash 116,154 115,410
Equity securities [1] 782,413 626,910
Available-for-sale debt securities 2,526,416 2,607,637
Other Assets:    
Derivative assets 73,633 43,675
Liabilities:    
Short-term debt 572,235 549,680
Deposits 2,625,556 2,449,812
Policy liabilities and Policy account balances (Investment contracts) 1,943,710 1,948,047
Long-term debt 5,965,759 5,733,118
Other Liabilities:    
Derivative liabilities ¥ 66,805 ¥ 35,543
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other Liabilities Other Liabilities
Level 1    
Assets:    
Cash and cash equivalents ¥ 1,334,945 ¥ 1,206,573
Restricted Cash 116,154 115,410
Installment loans (net of allowance for credit losses) 0 0
Equity securities 150,194 [2] 137,014 [3]
Available-for-sale debt securities 7,278 12,243
Other Assets:    
Time deposits 0 0
Derivative assets [4]
Reinsurance recoverables (Investment contracts) 0 0
Liabilities:    
Short-term debt 0 0
Deposits 0 0
Policy liabilities and Policy account balances (Investment contracts) 0 0
Long-term debt 0 0
Accounts payable (Contingent consideration) 0 0
Other Liabilities:    
Derivative liabilities [4]
Level 2    
Assets:    
Cash and cash equivalents 0 0
Restricted Cash 0 0
Installment loans (net of allowance for credit losses) 50,013 42,940
Equity securities 120,456 [2] 119,466 [3]
Available-for-sale debt securities 2,243,137 2,377,740
Other Assets:    
Time deposits 1,924 1,400
Derivative assets [4]
Reinsurance recoverables (Investment contracts) 0 0
Liabilities:    
Short-term debt 572,235 549,680
Deposits 2,449,230 2,279,207
Policy liabilities and Policy account balances (Investment contracts) 0 0
Long-term debt 1,777,695 1,705,485
Accounts payable (Contingent consideration) 0 0
Other Liabilities:    
Derivative liabilities [4]
Level 3    
Assets:    
Cash and cash equivalents 0 0
Restricted Cash 0 0
Installment loans (net of allowance for credit losses) 4,039,772 3,975,689
Equity securities 230,596 [2] 162,210 [3]
Available-for-sale debt securities 276,001 217,654
Other Assets:    
Time deposits 0 0
Derivative assets [4]
Reinsurance recoverables (Investment contracts) 277,544 126,480
Liabilities:    
Short-term debt 0 0
Deposits 0 0
Policy liabilities and Policy account balances (Investment contracts) 331,178 214,937
Long-term debt 4,111,340 3,973,343
Accounts payable (Contingent consideration) 15,683 15,259
Other Liabilities:    
Derivative liabilities [4]
Carrying amount    
Assets:    
Cash and cash equivalents 1,334,945 1,206,573
Restricted Cash 116,154 115,410
Installment loans (net of allowance for credit losses) 4,118,777 4,043,271
Equity securities 501,246 [2] 418,690 [3]
Available-for-sale debt securities 2,526,416 2,607,637
Other Assets:    
Time deposits 1,924 1,400
Derivative assets [4] 73,633 43,675
Reinsurance recoverables (Investment contracts) 307,733 138,441
Liabilities:    
Short-term debt 572,235 549,680
Deposits 2,439,459 2,280,597
Policy liabilities and Policy account balances (Investment contracts) 390,523 237,702
Long-term debt 5,965,759 5,733,118
Accounts payable (Contingent consideration) 15,683 15,259
Other Liabilities:    
Derivative liabilities [4] 66,805 35,543
Estimated fair value    
Assets:    
Cash and cash equivalents 1,334,945 1,206,573
Restricted Cash 116,154 115,410
Installment loans (net of allowance for credit losses) 4,089,785 4,018,629
Equity securities 501,246 [2] 418,690 [3]
Available-for-sale debt securities 2,526,416 2,607,637
Other Assets:    
Time deposits 1,924 1,400
Derivative assets [4] 73,633 43,675
Reinsurance recoverables (Investment contracts) 277,544 126,480
Liabilities:    
Short-term debt 572,235 549,680
Deposits 2,449,230 2,279,207
Policy liabilities and Policy account balances (Investment contracts) 331,178 214,937
Long-term debt 5,889,035 5,678,828
Accounts payable (Contingent consideration) 15,683 15,259
Other Liabilities:    
Derivative liabilities [4] ¥ 66,805 ¥ 35,543
[1] The amount of assets under management of variable annuity and variable life insurance contracts included in equity securities were ¥132,313 million and ¥137,933 million as of March 31, 2025 and 2026, respectively. The amount of investment funds and others elected the fair value option included in equity securities were ¥24,960 million and ¥24,845 million as of March 31, 2025 and 2026, respectively.
[2] The amount of ¥168,854 million of investment funds measured at net asset value per share is not included.
[3] The amount of ¥118,666 million of investment funds measured at net asset value per share is not included.
[4] It represents the amount after offset under counterparty netting of derivative assets and liabilities. For the information of input level before netting, see Note 2 “Fair Value Measurements.”