Item	The year ended March 31, 2007	The year ended March 31, 2008	The year ended March 31, 2009	The year ended March 31, 2010	The year ended March 31, 2011
Revenues	10,247,903	11,226,735	10,000,369	8,968,546	9,315,807
Cost of sales	8,088,371	8,777,657	7,816,180	6,849,255	6,967,433
Cost of sales ratio	78.9%	78.2%	78.1%	76.3%	74.8%
Selling, general and administrative expenses	1,977,020	2,103,562	2,057,043	1,917,132	1,903,866
Selling, general and administrative expenses ratio	19.3%	18.7%	20.6%	21.4%	20.4%
Operating income (loss)	182,512	345,516	127,146	202,159	444,508
Operating income (loss) ratio	1.8%	3.1%	1.3%	2.3%	4.8%
Net income (loss) attributable to Hitachi, Ltd.	-32,799	-58,125	-787,337	-106,961	238,869
Return on revenues	-0.3%	-0.5%	-7.9%	-1.2%	2.6%