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Borrowings - Maturities of Long-Term Borrowings (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2016
Mar. 31, 2015
Borrowings    
2017 ¥ 652,343  
2018 1,032,790  
2019 1,128,105  
2020 1,057,019  
2021 835,225  
2022 and thereafter 3,296,622  
Subtotal 8,002,104 ¥ 8,202,773
Trading balances of secured borrowings 127,455 133,523
Total ¥ 8,129,559 ¥ 8,336,296