(5)	Investments in Securities

The Company classifies its existing marketable equity securities other than investments in associated companies and all debt securities as available-for-sale.

The cost, fair value, gross unrealized holding gains and gross unrealized holding losses of available-for-sale securities included in short-term investments, and other investments and advances at March 31, 2011 and 2010 are as follows:


	Yen (millions)
	2011
	Cost		Fair value		Gross unrealized holding gains		Gross unrealized holding losses
Noncurrent:
Equity securities		250,400		313,813		67,755		4,342
Corporate and government bonds		2,142		2,201		59		—
Other debt securities		544		546		8		6

		253,086		316,560		67,822		4,348


	Yen (millions)
	2010
	Cost		Fair value		Gross unrealized holding gains		Gross unrealized holding losses
Noncurrent:
Equity securities		275,579		379,358		104,666		887
Corporate and government bonds		3,894		3,961		75		8
Other debt securities		568		585		22		5

		280,041		383,904		104,763		900

The cost, fair value, gross unrealized holding gains and gross unrealized holding losses of held-to-maturity securities included in other investments and advances are 1,954 million yen, 1,887 million yen, 16 million yen and 83 million yen at March 31, 2010, respectively.

Maturities of investments in available-for-sale securities at March 31, 2011 and 2010 are as follows:


	Yen (millions)
	2011				2010
	Cost		Fair value		Cost		Fair value
Due after one year through five years		2,686		2,747		4,462		4,546
Equity securities		250,400		313,813		275,579		379,358

		253,086		316,560		280,041		383,904

The Company was in possession of held-to-maturity securities due over 10 years at March 31, 2010. The cost and fair value of the related investments were 1,954 million yen and 1,887 million yen, respectively as of March 31, 2010.

Proceeds from sale of available-for-sale securities for the years ended March 31, 2011, 2010 and 2009 were 22,102 million yen, 18,275 million yen and 73,782 million yen, respectively. The gross realized gains on sale of available-for-sale securities for the years ended March 31, 2011, 2010 and 2009 were 5,474 million yen, 3,756 million yen and 797 million yen, respectively. The gross realized losses on sale of available-for-sale securities for the years ended March 31, 2011, 2010 and 2009 were 965 million yen, 88 million yen and 11 million yen, respectively. The cost of securities sold in computing gross realized gains and losses is determined by the average cost method.

During the years ended March 31, 2011, 2010 and 2009, the Company incurred a write-down of 19,154 million yen, 2,965 million yen and 73,861 million yen, respectively, for other-than-temporary impairment of available-for-sale securities, mainly reflecting the aggravated market condition of certain industries in Japan. The write-down is included in other deductions in the consolidated statements of operations.

Gross unrealized holding losses on investments in available-for-sale securities and the fair value of the related investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2011 and 2010 are as follows:


	Yen (millions)
	2011
	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Equity securities		48,891		4,342		—		—		48,891		4,342
Other debt securities		35		6		—		—		35		6

		48,926		4,348		—		—		48,926		4,348


	Yen (millions)
	2010
	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
Equity securities		6,222		887		—		—		6,222		887
Corporate and government bonds		1,194		8		—		—		1,194		8
Other debt securities		40		5		—		—		40		5

		7,456		900		—		—		7,456		900

The gross unrealized loss position has been continuing for a relatively short period of time. Based on this and other relevant factors, management has determined that these investments are not considered other-than-temporarily impaired. The Company did not have investment securities that had been in a continuous loss position for twelve months or more at March 31, 2011 and 2010.

At March 31, 2010, gross unrealized holding losses on investments in held-to-maturity securities and the fair value of the related investments are 83 million yen and 1,281 million yen, respectively.

The carrying amounts of the Company's cost method investments totaled 27,914 million yen and 22,039 million yen at March 31, 2011 and 2010, respectively. For substantially all such investments, the Company estimated that the fair value exceeded the carrying amounts of investments (that is, the investments were not impaired). For the years ended March 31, 2011, 2010 and 2009, certain investments were considered other-than-temporarily impaired, resulting in a write-down of 67 million yen, 374 million yen and 34 million yen, respectively.

At March 31, 2011 and 2010, equity securities with a book value of 14,047 million yen and 15,753 million yen were pledged as collateral for the deferred payments of certain taxes based on the Japanese Custom Act and Consumption Tax Law, respectively.