v3.26.1
Call Money and Funds Purchased (Tables)
12 Months Ended
Mar. 31, 2026
Call Money And Funds Purchased [Abstract]  
Summary of Funds Transactions
A summary of funds transactions for the fiscal years ended March 31, 2025 and 2026 is as follows:
 20252026
 
(in millions, except percentages and days)
Outstanding at end of fiscal year:   
Amount¥5,016,678 ¥5,257,237 
Principal range of maturities
1 day to 30 days
1 day to 30 days
Weighted average interest rate0.63%0.81%