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Other Comprehensive (Loss) Income
12 Months Ended
Mar. 31, 2011
Other Comprehensive (Loss) Income [Abstract]  
OTHER COMPREHENSIVE (LOSS) INCOME
15.   OTHER COMPREHENSIVE (LOSS) INCOME
    The changes in the components of accumulated other comprehensive income (loss) including amounts attributable to noncontrolling interests were as follows:
                                                                         
    Millions of Yen  
    2011     2010     2009  
            Tax                                             Tax        
    Pre-Tax     (Expense)     Net     Pre-Tax     Tax     Net     Pre-Tax     (Expense)     Net  
    Amount     Credit     Amount     Amount     Expense     Amount     Amount     Credit     Amount  
 
                                                                       
Foreign currency translation adjustments
  ¥ (3,003 )   ¥ 88     ¥ (2,915 )   ¥ 870     ¥ (75 )   ¥ 795     ¥ (9,402 )   ¥ 692     ¥ (8,710 )
Unrealized (loss) gain on securities:
                                                                       
Amount arising during the year
    (2,843 )     1,170       (1,673 )     4,319       (1,735 )     2,584       (10,092 )     4,030       (6,062 )
Reclassification adjustments
    1,014       (413 )     601       1,293       (526 )     767       1,828       (744 )     1,084  
 
                                                     
Net unrealized (loss) gain
    (1,829 )     757       (1,072 )     5,612       (2,261 )     3,351       (8,264 )     3,286       (4,978 )
 
                                                     
 
                                                                       
Pension liability adjustment:
                                                                       
Amount arising during the year
    (933 )     380       (553 )     1,575       (641 )     934       (6,800 )     2,768       (4,032 )
Reclassification adjustment
    564       (230 )     334       1,123       (457 )     666       228       (93 )     135  
 
                                                     
Net unrealized (loss) gain
    (369 )     150       (219 )     2,698       (1,098 )     1,600       (6,572 )     2,675       (3,897 )
 
                                                     
 
                                                                       
Other comprehensive (loss) income
  ¥ (5,201 )   ¥ 995     ¥ (4,206 )   ¥ 9,180     ¥ (3,434 )   ¥ 5,746     ¥ (24,238 )   ¥ 6,653     ¥ (17,585 )
 
                                                     
                         
    Thousands of U.S. Dollars  
    2011  
            Tax        
    Pre-Tax     (Expense)     Net  
    Amount     Credit     Amount  
 
                       
Foreign currency translation adjustments
  $ (36,286 )   $ 1,063     $ (35,223 )
Unrealized loss on securities:
                       
Amount arising during the year
    (34,352 )     14,137       (20,215 )
Reclassification adjustments
    12,252       (4,990 )     7,262  
 
                 
Net unrealized loss
    (22,100 )     9,147       (12,953 )
 
                 
 
                       
Pension liability adjustment:
                       
Amount arising during the year
    (11,274 )     4,592       (6,682 )
Reclassification adjustment
    6,816       (2,780 )     4,036  
 
                 
Net unrealized loss
    (4,458 )     1,812       (2,646 )
 
                 
 
                       
Other comprehensive loss
  $ (62,844 )   $ 12,022     $ (50,822 )