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Securitizations and Variable Interest Entities - Type and carrying value of financial assets (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2022
Mar. 31, 2021
Liabilities [Abstract]    
Long-term borrowings ¥ 9,258,306 ¥ 7,975,012
Transferred to SPEs [Member]    
Trading assets    
Loans for trading purposes 19,000 106,000
Loans receivable 203,000
Total 222,000 106,000
Liabilities [Abstract]    
Long-term borrowings ¥ 222,000 ¥ 106,000