v3.26.1
Other Income - Summary of Other Income (Parenthetical) (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of associates [line items]      
Reversal of impairment losses of investments in associates and joint ventures [1],[2] ¥ 104,083 ¥ 6,053 ¥ 1,674
Associates [member]      
Disclosure of associates [line items]      
Reversal of impairment losses of investments in associates and joint ventures 39,383    
Vietnam Prosperity [Member]      
Disclosure of associates [line items]      
Reversal of impairment losses of investments in associates and joint ventures ¥ 40,971    
[1] For the fiscal year ended March 31, 2026, the Group recognized a reversal of impairment losses of ¥39,383 million, on investments in associates and joint ventures, VPBank SMBC Finance Company Limited, due to the increase in the recoverable amount as determined by the value in use calculation.
[2] For the fiscal year ended March 31, 2026, the Group recognized a reversal of impairment losses of ¥40,971 million on investments in associates and joint ventures, due to the increase in the stock price of its equity-method associate, Vietnam Prosperity Joint-Stock Commercial Bank.