v3.26.1
Provisions - Components of and Changes in Provisions (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of other provisions [line items]      
Beginning balance ¥ 1,055,715    
Additional provisions 1,055,584    
Write-offs (486,284)    
Reversal (37,575)    
Other 96,036    
Ending balance 1,683,476 ¥ 1,055,715  
Product warranties [member]      
Disclosure of other provisions [line items]      
Beginning balance [1] 858,103    
Additional provisions 319,613 [1] 454,502 ¥ 536,590
Write-offs [1] (354,596)    
Reversal [1] (19,037)    
Other [1] 63,085    
Ending balance [1] 867,168 858,103  
EV-related losses [Member]      
Disclosure of other provisions [line items]      
Beginning balance [2] 52,199    
Additional provisions [2] 667,366    
Write-offs [2] (82,954)    
Reversal [2]    
Other [2] 10,886    
Ending balance [2] 647,497 52,199  
Other [member]      
Disclosure of other provisions [line items]      
Beginning balance 145,413    
Additional provisions 68,605    
Write-offs (48,734)    
Reversal (18,538)    
Other 22,065    
Ending balance ¥ 168,811 ¥ 145,413  
[1] Honda recognizes provisions for product warranties to cover future product warranty expenses. Honda recognizes costs for general warranties on products Honda sells and for specific warranty programs, including product recalls.
[2] Due to an increase in quantitative materiality as of the year ended March 31, 2026, provisions for EV-related losses which had been included in “Other” as of the year ended March 31, 2025, are presented separately. Accordingly, the balance as of April 1, 2025 has been reclassified.