Goodwill and Other Intangible Assets (Details) In Thousands	Mar. 31, 2011 USD ($)	Mar. 31, 2011 JPY (¥)	Mar. 31, 2010 JPY (¥)	Mar. 31, 2011 Software [Member] USD ($)	Mar. 31, 2011 Software [Member] JPY (¥)	Mar. 31, 2010 Software [Member] JPY (¥)	Mar. 31, 2011 Leasehold [Member] USD ($)	Mar. 31, 2011 Leasehold [Member] JPY (¥)	Mar. 31, 2010 Leasehold [Member] JPY (¥)	Mar. 31, 2011 Other [Member] USD ($)	Mar. 31, 2011 Other [Member] JPY (¥)	Mar. 31, 2010 Other [Member] JPY (¥)
Other intangible assets subject to amortization:
Gross carrying amount	$ 873,397	¥ 72,492,000	¥ 73,941,000	$ 402,012	¥ 33,367,000	¥ 34,699,000	$ 107,542	¥ 8,926,000	¥ 9,076,000	$ 363,843	¥ 30,199,000	¥ 30,166,000
Accumulated amortization	(379,614)	(31,508,000)	(24,909,000)	(211,217)	(17,531,000)	(13,280,000)	(19,096)	(1,585,000)	(1,586,000)	(149,301)	(12,392,000)	(10,043,000)
Net carrying amount	493,783	40,984,000	49,032,000	190,795	15,836,000	21,419,000	88,446	7,341,000	7,490,000	214,542	17,807,000	20,123,000
Other intangible assets not subject to amortization	156,470	12,987,000	12,697,000
Total other intangible assets	$ 650,253	¥ 53,971,000	¥ 61,729,000

The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
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Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
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The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Sum of the carrying amounts (original costs for current and prior period additions adjusted for impairment, if any) as of the balance sheet date of intangible assets, excluding goodwill, having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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