v3.26.1
Cash and Deposits with Banks - Reconciliation of Cash and Cash Equivalents Used for the Purposes of the Consolidated Statement of Cash Flows (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Cash and cash equivalents [abstract]        
Cash and deposits with banks ¥ 74,362,135 ¥ 76,669,401 ¥ 78,750,443  
Less: term deposits with original maturities over three months (1,044,197) (816,486) (663,985)  
Less: cash segregated as deposits and others (680,716) (602,791) (648,652)  
Cash and cash equivalents ¥ 72,637,222 ¥ 75,250,124 ¥ 77,437,806 ¥ 75,344,235