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Net Operating Loss Carryforwards Expire Date (Detail) (JPY ¥) In Millions, unless otherwise specified	Mar. 31, 2014
Operating Loss Carryforwards [Line Items]
2015	¥ 19,503
2016	862
2017	371
2018	87,397
2019	36,916
Thereafter	242,220
Total	¥ 387,269

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

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