Fair value measurements (Tables)

12 Months Ended

Mar. 31, 2011

Fair value measurements (Tables) [Abstract]

Assets and liabilities are measured at fair value on recurring basis

	Millions of yen
At March 31, 2011	Level 1		Level 2		Level 3		Total
Assets
Investment securities available for sale
Manufacturing industry	¥	30,219	¥	—	¥	—	¥	30,219
Financial service industry		16,439		—		—		16,439
Other		2,714		—		—		2,714
Derivatives
Forward contracts		—		416		—		416
Option contracts		—		7		—		7
Interest rate swaps, cross currency swap and interest rate cap agreements		—		10,608		—		10,608
Total Assets	¥	49,372	¥	11,031	¥	—	¥	60,403
Liabilities
Derivatives
Forward contracts	¥	—	¥	2,968	¥	—	¥	2,968
Interest rate swaps, cross currency swap and interest rate cap agreements		—		1,008		—		1,008
Other		—		26,665		859		27,524
Total Liabilities	¥	—	¥	30,641	¥	859	¥	31,500

	Millions of yen
At March 31, 2010	Level 1		Level 2		Level 3		Total
Assets
Investment securities available for sale
Manufacturing industry	¥	26,147	¥	—	¥	—	¥	26,147
Financial service industry		18,935		—		—		18,935
Other		2,096		—		—		2,096
Derivatives
Forward contracts		—		163		—		163
Option contracts		—		18		—		18
Interest rate swaps, cross currency swap and interest rate cap agreements		—		9,172		—		9,172
Total Assets	¥	47,178	¥	9,353	¥	—	¥	56,531
Liabilities
Derivatives
Forward contracts	¥	—	¥	2,078	¥	—	¥	2,078
Interest rate swaps, cross currency swap and interest rate cap agreements		—		2,550		—		2,550
Other		—		22,839		2,280		25,119
Total Liabilities	¥	—	¥	27,467	¥	2,280	¥	29,747

	Thousands of U.S. dollars
At March 31, 2011	Level 1		Level 2		Level 3		Total
Assets
Investment securities available for sale
Manufacturing industry	$	364,084	$	—	$	—	$	364,084
Financial service industry		198,060		—		—		198,060
Other		32,699		—		—		32,699
Derivatives
Forward contracts		—		5,012		—		5,012
Option contracts		—		84		—		84
Interest rate swaps, cross currency swap and interest rate cap agreement		—		127,808		—		127,808
Total Assets	$	594,843	$	132,904	$	—	$	727,747
Liabilities
Derivatives
Forward contracts	$	—	$	35,759	$	—	$	35,759
Interest rate swaps, cross currency swap and interest rate cap agreement		—		12,145		—		12,145
Other		—		321,265		10,349		331,614
Total Liabilities	$	—	$	369,169	$	10,349	$	379,518

Information about changes of Level 3

										Thousands of
	Millions of yen									U.S. dollars
	2011			2010			2009			2011
Balance at beginning of year	¥	(2,280	)	¥	919		¥	3,015		$	(27,470	)
Total gains or losses (realized/unrealized)		219			1,543			355			2,639
Included in earnings		6			1,605			349			73
Included in other comprehensive income (loss)		213			(62	)		6			2,566
Purchases, issuance and settlements		1,202			(4,742	)		(2,451	)		14,482
Balance at end of year	¥	(859	)	¥	(2,280	)	¥	919		$	(10,349	)