v3.26.1
Borrowings - Short-term and long-term borrowings (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Short-term borrowings:    
Total [1] ¥ 1,752,669 ¥ 1,117,292
Long-term borrowings:    
Long-term borrowings from banks and other financial institutions [2] 5,165,056 4,213,264
Bonds and notes issued [3] 9,834,531 8,698,285
Subtotal 14,999,587 12,911,549
Trading balances of secured borrowings 545,369 462,129
Total 15,544,956 13,373,678
Fixed-rate obligations [Member] | Japanese Yen denominated [Member]    
Long-term borrowings:    
Bonds and notes issued [3] 1,116,741 1,170,404
Fixed-rate obligations [Member] | Non-Japanese Yen denominated [Member]    
Long-term borrowings:    
Bonds and notes issued [3] 5,724,325 4,778,830
Floating-rate obligations [Member] | Japanese Yen denominated [Member]    
Long-term borrowings:    
Bonds and notes issued [3] 522,891 603,794
Floating-rate obligations [Member] | Non-Japanese Yen denominated [Member]    
Long-term borrowings:    
Bonds and notes issued [3] 841,213 708,559
Index / Equity-linked obligations [Member] | Japanese Yen denominated [Member]    
Long-term borrowings:    
Bonds and notes issued [3] 941,444 926,572
Index / Equity-linked obligations [Member] | Non-Japanese Yen denominated [Member]    
Long-term borrowings:    
Bonds and notes issued [3] 687,917 510,126
Short-term borrowings [Member]    
Short-term borrowings:    
Commercial paper [1] 90,795 113,765
Bank borrowings [1] 700,802 341,561
Other [1] ¥ 961,072 ¥ 661,966
[1] Includes secured borrowings of ¥119,682 million and ¥113,315 million as of March 31, 2025 and March 31, 2026 respectively.
[2] Includes secured borrowings of ¥472,328 million and ¥670,182 million as of March 31, 2025 and March 31, 2026 respectively.
[3] Includes secured borrowings of ¥811,118 million and ¥720,958 million as of March 31, 2025 and March 31, 2026 respectively.