v3.25.2
Property, Plant and Equipment - Schedule of Reconciliation of Changes in Right-of-use Assets (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance ¥ 533,403 ¥ 410,274
Ending balance 481,492 533,403
Acquisition cost of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 763,989 590,724
Additions and other increases 24,986 144,950
Disposals and other decreases (37,286) (41,341)
Reclassification to assets held for sale (Note 19)   (573)
Foreign currency translation differences (11,484) 70,228
Ending balance 740,204 763,989
Accumulated depreciation and accumulated impairment losses of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance (230,586) (180,450)
Depreciation expenses (50,656) (50,954)
Disposals and other decreases 18,437 21,505
Reclassification to assets held for sale (Note 19)   562
Foreign currency translation differences 4,092 (21,249)
Ending balance (258,712) (230,586)
Buildings and structures    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 521,403 401,437
Ending balance 470,089 521,403
Buildings and structures | Acquisition cost of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 741,898 573,585
Additions and other increases 18,118 136,969
Disposals and other decreases (32,499) (36,468)
Reclassification to assets held for sale (Note 19)   (408)
Foreign currency translation differences (10,687) 68,220
Ending balance 716,831 741,898
Buildings and structures | Accumulated depreciation and accumulated impairment losses of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance (220,496) (172,149)
Depreciation expenses (44,571) (45,635)
Disposals and other decreases 14,587 17,251
Reclassification to assets held for sale (Note 19)   405
Foreign currency translation differences 3,738 (20,368)
Ending balance (246,742) (220,496)
Machinery and vehicles    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 11,950 8,781
Ending balance 11,373 11,950
Machinery and vehicles | Acquisition cost of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 21,880 16,818
Additions and other increases 6,867 7,950
Disposals and other decreases (4,677) (4,840)
Reclassification to assets held for sale (Note 19)   (38)
Foreign currency translation differences (795) 1,988
Ending balance 23,275 21,880
Machinery and vehicles | Accumulated depreciation and accumulated impairment losses of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance (9,930) (8,037)
Depreciation expenses (6,065) (5,286)
Disposals and other decreases 3,741 4,221
Reclassification to assets held for sale (Note 19)   38
Foreign currency translation differences 352 (865)
Ending balance (11,902) (9,930)
Tools, furniture, and fixtures    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 51 56
Ending balance 30 51
Tools, furniture, and fixtures | Acquisition cost of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 211 320
Additions and other increases 0 31
Disposals and other decreases (110) (33)
Reclassification to assets held for sale (Note 19)   (127)
Foreign currency translation differences (2) 20
Ending balance 98 211
Tools, furniture, and fixtures | Accumulated depreciation and accumulated impairment losses of ROU Assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance (160) (264)
Depreciation expenses (19) (33)
Disposals and other decreases 109 33
Reclassification to assets held for sale (Note 19)   120
Foreign currency translation differences 2 (16)
Ending balance ¥ (68) ¥ (160)