v3.25.2
Income Taxes - Schedule of Reconciliation from Income Tax Expense (Benefit) (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Profit before tax   ¥ 175,084 ¥ 52,791 ¥ 375,090
Applicable tax rate 31.50% 30.60% 30.60% 30.60%
Income tax expense at Takeda’s domestic (Japanese) statutory tax rate of 30.6%   ¥ 53,541 ¥ 16,143 ¥ 114,703
Non-deductible expenses for tax purposes   25,860 21,353 15,158
Changes in unrecognized deferred tax assets and deferred tax liabilities   45,243 (3,512) (21,791)
Tax credits   (28,371) (30,654) (26,676)
Differences in applicable tax rates of overseas subsidiaries   (39,963) (29,782) (31,446)
Changes in tax effects of undistributed profit of overseas subsidiaries   10,282 (1,737) 6,174
Effect of changes in applicable tax rates and tax law   (6,964) (11,994) 2,482
Tax contingencies   426 (83,784) 13,991
Effect of prior year items   3,305 (2,479) (7,524)
Entity reorganizations/Divestments   2,880 33,469 (6,321)
Other   702 1,571 (698)
Total   66,941 (91,406) ¥ 58,052
Tax effect of changes in unrecognized deferred tax assets, deferred tax expense related to interest expense carryforward   21,600    
US state law change        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Effect of changes in applicable tax rates and tax law   5,809 4,206  
Extension of the carryforward period, Japanese earnings stripping rules        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Effect of changes in applicable tax rates and tax law     (16,200)  
Japan tax rate change        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Effect of changes in applicable tax rates and tax law   ¥ 1,155    
AbbVie break fee case with IRA        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Tax contingencies     ¥ (63,547)