v3.26.1
Financial Instruments - Schedule of Reconciliation of Liabilities Arising from Financing Activities (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance ¥ 5,020,436 ¥ 5,368,024  
Cash flows from financing activities      
Net increase (decrease) in short-term loans and commercial papers (341,780) 27,490 ¥ 277,000
Proceeds from long-term loans 60,000 90,000  
Repayments of long-term loans (85,136) (587,246)  
Proceeds from bonds 526,060 934,460  
Repayments of bonds (115,296) (733,844)  
Settlement of cross currency interest swaps related to bonds and loans 0 46,880 60,063
Repayments of lease liabilities (42,772) (45,174)  
Interest paid (24,366) (24,511)  
Non-cash items      
Foreign exchange movement 357,155 (74,744)  
Change in fair value (86,862) (19,666)  
New, amended and terminated leases 24,259 7,752  
Others 29,644 31,016  
Ending balance 5,321,342 5,020,436 5,368,024
Bonds      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 4,190,632 4,092,879  
Cash flows from financing activities      
Net increase (decrease) in short-term loans and commercial papers (270,000) (47,000)  
Proceeds from bonds 526,060 934,460  
Repayments of bonds (115,296) (733,844)  
Non-cash items      
Foreign exchange movement 320,067 (62,248)  
Others 5,348 6,385  
Ending balance 4,656,812 4,190,632 4,092,879
Long-term loans      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 250,012 750,622  
Cash flows from financing activities      
Proceeds from long-term loans 60,000 90,000  
Repayments of long-term loans (85,136) (587,246)  
Non-cash items      
Foreign exchange movement 104 (3,603)  
Others 20 239  
Ending balance 225,000 250,012 750,622
Short-term loans      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 74,621 251  
Cash flows from financing activities      
Net increase (decrease) in short-term loans and commercial papers (71,780) 74,490  
Non-cash items      
Foreign exchange movement (2,725) 0  
Others (90) (119)  
Ending balance 26 74,621 251
Lease liabilities      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance 573,325 619,639  
Cash flows from financing activities      
Repayments of lease liabilities (42,772) (45,174)  
Interest paid (24,366) (24,511)  
Non-cash items      
Foreign exchange movement 39,709 (8,892)  
New, amended and terminated leases 24,259 7,752  
Others 24,366 24,511  
Ending balance 594,520 573,325 619,639
Derivative assets used for hedge of debts      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Beginning balance (68,154) (95,368)  
Cash flows from financing activities      
Settlement of cross currency interest swaps related to bonds and loans   46,880  
Non-cash items      
Change in fair value (86,862) (19,666)  
Ending balance ¥ (155,015) ¥ (68,154) ¥ (95,368)