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Schedule of Time Deposits Maturity (Detail) (JPY ¥)
In Millions, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Deposits From Banking Clients [Line Items]    
2015 ¥ 658,234  
2016 153,138  
2017 83,014  
2018 28,240  
2019 58,556  
Total ¥ 981,182 ¥ 885,482