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Earnings per share (Tables)
6 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
Summary of amounts and numbers used in calculation of net income attributable to NHI shareholders per share (basic and diluted)
A reconciliation of the amounts and the numbers used in the calculation of net income attributable to NHI shareholders per share (basic and diluted) is as follows:
 
    
Millions of yen

except per share data

presented in yen
 
    
Six months ended September 30
 
    
2022
    
2023
 
Basic—
                 
Net income attributable to NHI shareholders
   ¥ 18,467      ¥ 58,563  
Weighted average number of shares outstanding
     3,010,633,495        3,028,036,425  
Net income attributable to NHI shareholders per share
   ¥ 6.13      ¥ 19.34  
    
 
 
    
 
 
 
Diluted—
                 
Net income attributable to NHI shareholders
   ¥ 18,354      ¥ 58,468  
Weighted average number of shares outstanding
     3,104,874,653        3,140,207,716  
Net income attributable to NHI shareholders per share
   ¥ 5.91      ¥ 18.62  
    
 
 
    
 
 
 
   
    
Millions of yen

except per share data

presented in yen
 
    
Three months ended September 30
 
    
2022
    
2023
 
Basic—
                 
Net income attributable to NHI shareholders
   ¥ 16,771      ¥ 35,232  
Weighted average number of shares outstanding
     3,001,728,417        3,035,142,936  
Net income attributable to NHI shareholders per share
   ¥ 5.59      ¥ 11.61  
    
 
 
    
 
 
 
Diluted—
                 
Net income attributable to NHI shareholders
   ¥ 16,738      ¥ 35,202  
Weighted average number of shares outstanding
     3,093,327,844        3,140,174,302  
Net income attributable to NHI shareholders per share
   ¥ 5.41      ¥ 11.21