v3.25.2
Financial Instruments - Schedule of Fair Value of Contingent Consideration Classified as Level 3 (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent liabilities recognised in business combination at beginning of period ¥ 7,772 ¥ 8,139
Changes in the fair value during the period (2,059) 8,678
Settled and paid during the period (774) (9,032)
Foreign currency translation differences (577) (13)
Contingent liabilities recognised in business combination at end of period 4,362 7,772
Within one year    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent liabilities recognised in business combination at beginning of period 2,207  
Contingent liabilities recognised in business combination at end of period 3,003 2,207
Between one and three years    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent liabilities recognised in business combination at beginning of period 3,698  
Contingent liabilities recognised in business combination at end of period 1,398 3,698
Between three and five years    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent liabilities recognised in business combination at beginning of period 1,855  
Contingent liabilities recognised in business combination at end of period 0 1,855
More than five years    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Contingent liabilities recognised in business combination at beginning of period 1,171  
Contingent liabilities recognised in business combination at end of period ¥ 0 ¥ 1,171