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Stock-Based Compensation (Tables) | 12 Months Ended
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Mar. 31, 2014
Summary of Information Related to Stock Acquisition Rights | A summary of the Company’s stock acquisition rights is as follows:
Years ended March 31, |  | Exercise period |  | Number of shares granted* |  |  | Exercise price * |
|  |  | Yen |
2004 |  | From June 26, 2005 to June 25, 2013 |  |  | 5,160,000 |  |  | ¥ | 700 |
2005 |  | From June 24, 2006 to June 23, 2014 |  |  | 5,289,000 |  |  |  | 1,172 |
2006 |  | From June 22, 2007 to June 21, 2015 |  |  | 4,774,000 |  |  |  | 1,891 |
2007 |  | From June 21, 2008 to June 20, 2016 |  |  | 1,942,000 |  |  |  | 2,962 |
2008 |  | From July 5, 2009 to June 22, 2017 |  |  | 1,449,800 |  |  |  | 3,101 |
2009 |  | From July 18, 2010 to June 24, 2018 |  |  | 1,479,000 |  |  |  | 1,689 |
* | The number of shares and exercise price of the granted options were adjusted for the 10-for-1 stock split implemented on April 1, 2013.
Summary of Information about Stock Options Activity | The following table summarizes information about the activity of these stock options for the year ended 2014:
|  | Number of shares*2 |  |  | Weighted average exercise price*1*2 |  |  | Weighted average remaining contractual life |  |  | Aggregate intrinsic value |
|  |  | Yen |  |  | Years |  |  | Millions of yen |
Outstanding at beginning of the year |  |  | 9,051,000 |  |  | ¥ | 2,011 |  |  |  |  |  |  |  |  |
Exercised |  |  | (804,300 | ) |  |  | 1,077 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (430,200 | ) |  |  | 1,846 |  |  |  |  |  |  |  |  |
Outstanding at end of year |  |  | 7,816,500 |  |  |  | 2,117 |  |  |  | 1.97 |  |  | ¥ | 327 |
Exercisable at end of year |  |  | 7,816,500 |  |  | ¥ | 2,117 |  |  |  | 1.97 |  |  | ¥ | 327 |
*1 | The exercise prices of the granted options were adjusted in July 2009 for the issuance of new 18 million shares.
*2 | The number of shares and exercise price of the granted options were adjusted for the 10-for-1 stock split implemented on April 1, 2013.

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Article 5 + Details
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