v3.26.1
Mizuho Financial Group, Inc., Parent Company (Condensed Balance Sheets) (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Assets:      
Cash and due from banking subsidiaries ¥ 2,699,180 ¥ 2,292,295  
Interest-bearing deposits in banking subsidiaries 59,907,221 71,143,684  
Other assets 8,082,090 8,234,429  
Total assets 294,895,707 276,741,152 ¥ 272,173,200
Liabilities and shareholders' equity:      
Long-term debt 20,838,501 14,914,120  
Other liabilities 7,171,197 6,608,355  
Shareholders' equity 10,859,633 10,065,015  
Total liabilities and equity 294,895,707 276,741,152  
Parent Company      
Assets:      
Cash and due from banking subsidiaries 36,614 35,683  
Interest-bearing deposits in banking subsidiaries 410 440  
Other assets 524,333 525,732  
Total assets 23,572,507 20,938,928  
Liabilities and shareholders' equity:      
Short-term borrowings from a banking subsidiary 815,000 530,000  
Long-term debt 11,473,541 9,921,424  
Other liabilities 424,333 422,489  
Shareholders' equity 10,859,633 10,065,015  
Total liabilities and equity 23,572,507 20,938,928  
Parent Company | Banking Subsidiaries      
Assets:      
Investments in subsidiaries and affiliated companies 9,283,191 8,460,561  
Parent Company | Banking Subsidiaries | Affiliated Entity      
Assets:      
Long-term loans receivable from subsidiaries 11,528,769 9,949,664  
Parent Company | Non-banking subsidiaries and affiliated companies      
Assets:      
Investments in subsidiaries and affiliated companies 1,655,189 1,452,849  
Parent Company | Non-banking subsidiaries and affiliated companies | Affiliated Entity      
Assets:      
Long-term loans receivable from subsidiaries ¥ 544,000 ¥ 514,000