v3.26.1
Provisions - Schedule of Reconciliation of Changes in Provisions (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reconciliation of changes in other provisions [abstract]    
Beginning balance ¥ 568,317 ¥ 538,793
Increases 1,437,561 960,049
Decreases (utilized) (965,541) (863,606)
Decreases (reversed) (56,922) (52,275)
Foreign currency translation differences 52,635 (14,644)
Ending balance 1,036,051 568,317
Legal proceedings provision    
Reconciliation of changes in other provisions [abstract]    
Beginning balance 12,462 22,342
Increases 408,681 7,181
Decreases (utilized) (5,758) (16,959)
Decreases (reversed) (646) (63)
Foreign currency translation differences 1,010 (40)
Ending balance 415,749 12,462
Restructuring    
Reconciliation of changes in other provisions [abstract]    
Beginning balance 13,995 12,102
Increases 31,135 41,794
Decreases (utilized) (16,842) (29,976)
Decreases (reversed) (1,953) (8,609)
Foreign currency translation differences 1,592 (1,316)
Ending balance 27,927 13,995
Rebates and return reserves    
Reconciliation of changes in other provisions [abstract]    
Beginning balance 499,165 483,259
Increases 989,718 871,225
Decreases (utilized) (932,913) (799,841)
Decreases (reversed) (51,243) (42,854)
Foreign currency translation differences 47,341 (12,624)
Ending balance 552,068 499,165
Other    
Reconciliation of changes in other provisions [abstract]    
Beginning balance 42,695 21,089
Increases 8,028 39,848
Decreases (utilized) (10,027) (16,829)
Decreases (reversed) (3,080) (750)
Foreign currency translation differences 2,692 (664)
Ending balance ¥ 40,308 ¥ 42,695