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Other Comprehensive Income (Loss) (Schedule Of Components Of Other Comprehensive Income (Loss) Attributable To Kubota Corporation And Noncontrolling Interests) (Detail) (JPY ¥)
In Millions, unless otherwise specified
12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2010
Other Comprehensive Income (Loss) [Abstract]      
Foreign currency translation adjustments, Kubota Corporation ¥ (10,743) ¥ (23,294) ¥ 6,408
Unrealized gains (losses) on securities, Kubota Corporation 3,190 (5,128) 11,728
Unrealized gains (losses) on derivatives, Kubota Corporation 531 805 570
Pension liability adjustments, Kubota Corporation (8,095) (3,093) 9,723
Other comprehensive income (loss), Kubota Corporation (15,117) (30,710) 28,429
Foreign currency translation adjustments, Non-controlling Interests (2,616) (3,088) 1,842
Unrealized gains (losses) on securities, Non-controlling Interests 30 3 33
Unrealized gains (losses) on derivatives, Non-controlling Interests 7 (1) (14)
Pension liability adjustments, Non-controlling Interests (266) 13 85
Other comprehensive income (loss), Non-controlling Interests (2,845) (3,073) 1,946
Foreign currency translation adjustments, Total (13,359) (26,382) 8,250
Unrealized gains (losses) on securities, Total 3,220 (5,125) 11,761
Unrealized gains (losses) on derivatives, Total 538 804 556
Pension liability adjustments, Total (8,361) (3,080) 9,808
Total other comprehensive income (loss) ¥ (17,962) ¥ (33,783) ¥ 30,375