v3.25.2
Stockholders' equity - Summary of Analysis of Other Comprehensive Income by Item (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Changes in equity instruments measured at fair value through other comprehensive income      
Amount incurred during the year ¥ (16,607) ¥ (70,838) ¥ (45,708)
Total before tax (16,607) (70,838) (45,708)
Tax expense or (benefit) 4,076 17,024 8,846
Net of tax (12,531) (53,814) (36,862)
Remeasurement of defined benefit pension plans      
Amount incurred during the year 15,133 37,225 27,136
Total before tax 15,133 37,225 27,136
Tax expense or (benefit) (4,550) (11,350) (8,245)
Net of tax 10,583 25,875 18,891
Share of other comprehensive income of investments accounted for using the equity method      
Amount incurred during the year (1,287) 704 197
Total before tax (1,287) 704 197
Tax expense or (benefit) 376 (91) (52)
Net of tax (911) 613 145
Total (2,859) (27,326) (17,826)
Changes in debt instruments measured at fair value through other comprehensive income      
Amount incurred during the year (975,677) (973,877) (1,132,497)
Reclassification to profit or loss 4,537 (4,713) (5,300)
Total before tax (971,140) (978,590) (1,137,797)
Tax expense or (benefit) 289,625 273,954 318,605
Net of tax (681,515) (704,636) (819,192)
Cash flow hedges      
Amount incurred during the year (5,384) (15,032) (12,975)
Reclassification to profit or loss 433 16,982 30,813
Total before tax (4,951) 1,950 17,838
Tax expense or (benefit) 656 (598) (5,459)
Net of tax (4,295) 1,352 12,379
Insurance finance income (expenses)      
Amount incurred during the year 788,366 782,495 [1] 1,010,717 [1]
Total before tax 788,366 782,495 1,010,717
Tax expense or (benefit) (220,075) (219,099) (283,001)
Net of tax 568,291 563,396 727,716
Exchange differences on translating foreign operations      
Amount incurred during the year (78,193) 441,943 177,645
Reclassification to profit or loss (1,073) 463 630
Total before tax (79,266) 442,406 178,275
Net of tax (79,266) 442,406 178,275
Share of other comprehensive income of investments accounted for using the equity method      
Amount incurred during the year (337) 4,735 3,554
Total before tax (337) 4,735 3,554
Net of tax (337) 4,735 3,554
Other      
Amount incurred during the year (953) (393) (200)
Total before tax (953) (393) (200)
Tax expense or (benefit) 277 110 56
Net of tax (676) (283) (144)
Total (197,798) 306,970 102,588
Total other comprehensive income, net of tax ¥ (200,657) ¥ 279,644 ¥ 84,762
[1] Expenses are presented as positive and income is presented as negative.