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Stock-Based Compensation (Tables)
12 Months Ended
Mar. 31, 2011
Schedule of Stockholders' Equity Note, Warrants or Rights

A summary of information related to the Company’s stock acquisition rights is as follows:

 

Years ended March 31,

  

Exercise period

   Number of shares
Initially granted
     Exercise price  
         Yen      U.S. dollars  

2003

   From June 27, 2004 to June 26, 2012      453,300       ¥ 7,206       $ 87   

2004

   From June 26, 2005 to June 25, 2013      516,000         6,991         84   

2005

   From June 24, 2006 to June 23, 2014      528,900         11,720         141   

2006

   From June 22, 2007 to June 21, 2015      477,400         18,903         227   

2007

   From June 21, 2008 to June 20, 2016      194,200         29,611         356   

2008

   From July 5, 2009 to June 22, 2017      144,980         31,009         373   

2009

   From July 18, 2010 to June 24, 2018      147,900         16,888         203
Employee Stock Options Activity

The following table summarizes information about the activity of these stock options for the year ended 2011:

 

     Number of
shares
    Weighted average
exercise price (*)
     Weighted average
remaining
contractual life
     Aggregate intrinsic value  
     Yen      U.S. dollar      Years      Millions of yen      Millions of
U.S. dollar
 

Outstanding at beginning of the year

     1,370,380      ¥ 18,261       $ 219.62            

Exercised

     (14,000     7,146         85.94            

Forfeited or expired

     (134,020     17,308         208.15            
                      

Outstanding at end of year

     1,222,360        18,493         222.41         4.26       ¥         0      $         0   
                      

Exercisable at end of year

     1,222,360      ¥ 18,493       $ 222.41         4.26       ¥ 0      $ 0   

 

* The exercise prices of the granted options were adjusted in July 2009 for the issuance of new 18 million shares.
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used

The fair value of each option was estimated on the date of grant under the following assumptions with the binominal option-pricing model. As for fiscal 2010 and 2011, the fair value of options was not estimated because no stock options were granted.

 

     2009  

Weighted-average grant-date fair value

   ¥ 5,630   

Risk-free rate

     0.60-1.52

Expected volatility

     46.00

Expected dividend yield

     1.73