Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2011

Goodwill and Other Intangible Assets (Table) [Abstract]

Intangible assets other than goodwill

	Millions of yen														Thousands of U.S. dollars
	2011							2010							2011
	Gross					Net		Gross					Net		Gross					Net
	carrying		Accumulated			carrying		carrying		Accumulated			carrying		carrying		Accumulated			carrying
	amount		amortization			amount		amount		amortization			amount		amount		amortization			amount
Other intangible assets subject to amortization:
Software	¥	33,367	¥	(17,531	)	¥	15,836	¥	34,699	¥	(13,280	)	¥	21,419	$	402,012	$	(211,217	)	$	190,795
Leasehold		8,926		(1,585	)		7,341		9,076		(1,586	)		7,490		107,542		(19,096	)		88,446
Other		30,199		(12,392	)		17,807		30,166		(10,043	)		20,123		363,843		(149,301	)		214,542
Total		72,492		(31,508	)		40,984		73,941		(24,909	)		49,032		873,397		(379,614	)		493,783
Other intangible assets not subject to amortization							12,987							12,697							156,470
Total other intangible assets						¥	53,971						¥	61,729						$	650,253

Amortization expense of other intangible assets

Year ending March 31	Millions of yen
2012	¥	7,891
2013		6,702
2014		4,723
2015		3,461
2016		2,167

Changes in carrying amounts of goodwill

	Millions of yen
	Construction, Mining			Industrial Machinery
	and Utility Equipment			and Others
	segment			segment			Total
Balance at March 31, 2009
Goodwill	¥	23,437		¥	13,943		¥	37,380
Accumulated impairment losses		(8,179	)		(540	)		(8,719	)
	¥	15,258		¥	13,403		¥	28,661
Goodwill acquired during the year		736			—			736
Foreign exchange impact		173			—			173
Balance at March 31, 2010
Goodwill		24,346			13,943			38,289
Accumulated impairment losses		(8,179	)		(540	)		(8,719	)
	¥	16,167		¥	13,403		¥	29,570
Goodwill acquired during the year		578			—			578
Foreign exchange impact		(826	)		(1	)		(827	)
Balance at March 31, 2011
Goodwill		24,098			13,942			38,040
Accumulated impairment losses		(8,179	)		(540	)		(8,719	)
	¥	15,919		¥	13,402		¥	29,321

	Thousands of U.S. dollars
	Construction, Mining			Industrial Machinery
	and Utility Equipment			and Others
	segment			segment			Total
Balance at March 31, 2010
Goodwill	$	293,325		$	167,988		$	461,313
Accumulated impairment losses		(98,542	)		(6,506	)		(105,048	)
	$	194,783		$	161,482		$	356,265
Goodwill acquired during the year		6,964			—			6,964
Foreign exchange impact		(9,952	)		(12	)		(9,964	)
Balance at March 31, 2011
Goodwill		290,337			167,976			458,313
Accumulated impairment losses		(98,542	)		(6,506	)		(105,048	)
	$	191,795		$	161,470		$	353,265