v3.25.2
Related party transactions - Summary of Account Balances and Transactions with Associates and Joint Ventures Accounted for Under the Equity Method (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of transactions between related parties [line items]      
Trade and other accounts receivables ¥ 24,844 ¥ 23,270  
Other current assets 8,192 8,195  
Accounts payable, trade 1,157 1,262  
Short-term borrowings 23,042 29,454  
Lease liabilities and other 79,987 78,102  
Accounts payable for property, plant and equipment 49 16  
Sales 48,669 48,414 ¥ 45,260
Purchases 6,302 7,108 5,099
Lease payments and other 16,931 15,467 13,720
Payments for property, plant and equipment 373 16 20,553
Associates [member]      
Disclosure of transactions between related parties [line items]      
Trade and other accounts receivables 20,990 19,357  
Other current assets 8,192 8,195  
Accounts payable, trade 1,102 997  
Short-term borrowings 5,401 3,070  
Lease liabilities and other 79,987 78,102  
Accounts payable for property, plant and equipment 49 16  
Sales 14,254 14,215 15,040
Purchases 5,171 6,385 4,450
Lease payments and other 16,931 15,467 13,720
Payments for property, plant and equipment 373 16 20,553
Joint ventures [member]      
Disclosure of transactions between related parties [line items]      
Trade and other accounts receivables 3,854 3,913  
Accounts payable, trade 55 265  
Short-term borrowings 17,641 26,384  
Sales 34,415 34,199 30,220
Purchases ¥ 1,131 ¥ 723 ¥ 649