v3.26.1
Income Taxes - Schedule of Reconciliation of Changes in Deferred Taxes (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year ¥ 335,592 ¥ 280,088
Recognized in profit or (loss) 101,034 71,116
Recognized in other comprehensive income 45,431 6,891
Other 37,399 (22,503)
Net deferred tax liabilities, as of end of year 519,456 335,592
Research and development expenses    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 280,558 217,010
Recognized in profit or (loss) (124,569) 53,732
Recognized in other comprehensive income 0 0
Other 3,694 9,816
Net deferred tax liabilities, as of end of year 159,683 280,558
Inventories    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 191,879 138,402
Recognized in profit or (loss) (18,055) 64,265
Recognized in other comprehensive income 0 0
Other 13,064 (10,788)
Net deferred tax liabilities, as of end of year 186,888 191,879
Property, plant and equipment    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year (65,016) (68,509)
Recognized in profit or (loss) 2,767 5,332
Recognized in other comprehensive income 0 0
Other (2,570) (1,839)
Net deferred tax liabilities, as of end of year (64,819) (65,016)
Intangible assets    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year (341,837) (390,270)
Recognized in profit or (loss) 64,714 65,032
Recognized in other comprehensive income 0 0
Other (15,456) (16,599)
Net deferred tax liabilities, as of end of year (292,579) (341,837)
Financial assets measured at FVTOCI    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year (2,285) (7,639)
Recognized in profit or (loss) 0 0
Recognized in other comprehensive income 1,941 4,235
Other (3,567) 1,119
Net deferred tax liabilities, as of end of year (3,911) (2,285)
Accrued expenses and provisions    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 118,207 185,593
Recognized in profit or (loss) 80,641 (75,010)
Recognized in other comprehensive income 0 0
Other 19,246 7,624
Net deferred tax liabilities, as of end of year 218,094 118,207
Defined benefit plans    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 13,566 14,728
Recognized in profit or (loss) (877) (3,768)
Recognized in other comprehensive income (468) 2,231
Other 2,016 375
Net deferred tax liabilities, as of end of year 14,237 13,566
Deferred income    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 4,659 5,493
Recognized in profit or (loss) (541) (875)
Recognized in other comprehensive income 0 0
Other 46 41
Net deferred tax liabilities, as of end of year 4,164 4,659
Unused tax losses    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 55,289 88,671
Recognized in profit or (loss) 77,864 (36,355)
Recognized in other comprehensive income 57,635 0
Other 17,343 2,973
Net deferred tax liabilities, as of end of year 208,131 55,289
Tax credits    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 27,354 46,159
Recognized in profit or (loss) 20,816 (21,469)
Recognized in other comprehensive income 0 0
Other 4,503 2,664
Net deferred tax liabilities, as of end of year 52,673 27,354
Investments in subsidiaries and associates    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year (9,567) (26,801)
Recognized in profit or (loss) 3,259 17,595
Recognized in other comprehensive income 0 0
Other 437 (361)
Net deferred tax liabilities, as of end of year (5,871) (9,567)
Cash flow hedges    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 29,850 21,645
Recognized in profit or (loss) 4,156 2,969
Recognized in other comprehensive income (10,626) 3,775
Other (1,246) 1,461
Net deferred tax liabilities, as of end of year 22,134 29,850
Other    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Net deferred tax liabilities, as of beginning of year 32,935 55,606
Recognized in profit or (loss) (9,141) (332)
Recognized in other comprehensive income (3,051) (3,350)
Other (111) (18,989)
Net deferred tax liabilities, as of end of year ¥ 20,632 ¥ 32,935