Amendments (February 4, 2011) TDK Corporation January 31, 2011 Contact; TDK Corporation(Tokyo) Corporate Communications Department Tatsuhiko Atsumi +81(3)5201-7102 Consolidated results (U.S. GAAP) for the 9-month-period of FY March 2011 Summary (April 1, 2010 - December 31, 2010) Term Item Net sales Operating income Income before income taxes Net income attributable to TDK Per common share : Net income attributable to TDK / Basic Net income attributable to TDK / Diluted Capital expenditures Depreciation and amortization Research and development Result of financial income (loss) Ratio of overseas production Number of employees The 9-month-period of FY2010 (April 1, 2009 - Dec. 31, 2009) (Yen millions) % 597,513 100.0 17,495 2.9 10,832 1.8 9,966 1.7 The 9-month-period of FY2011 (April 1, 2010 - Dec. 31, 2010) (Yen millions) 662,171 54,401 51,201 % (U.S.$ thousands) (Yen millions) Change(%) 100.0 8,174,951 64,658 10.8 8.2 671,617 36,906 211.0 7.7 632,111 40,369 372.7 38,711 5.8 477,914 Yen 77.26 Yen 300.10 U.S.$ 3.70 Yen 77.21 Yen 299.82 U.S.$ 3.70 48,335 62,711 40,213 (2,033) 79.9% 73,410 10.5 6.7 - Change 54,081 57,511 38,885 (1,064) 83.7% 83,895 8.7 5.9 - 667,667 710,012 480,062 (13,136) - 28,745 288.4 5,746 (5,200) (1,328) 969 11.9 -8.3 -3.3 - 3rd quarter consolidated results (October 1, 2010 - December 31, 2010) Term Item Net sales Operating income Income before income taxes Net income attributable to TDK Per common share : Net income attributable to TDK / Basic Net income attributable to TDK / Diluted Capital expenditures Depreciation and amortization Research and development Result of financial income (loss) Ratio of overseas production 3Q of FY2010 (Oct. 1, 2009 - Dec. 31, 2009) (Yen millions) % 211,662 100.0 12,093 5.7 9,879 4.7 8,826 4.2 3Q of FY2011 (Oct. 1, 2010 - Dec. 31, 2010) (Yen millions) 219,937 17,213 16,557 % (U.S.$ thousands) (Yen millions) Change(%) 100.0 2,715,272 8,275 3.9 7.8 212,506 5,120 42.3 7.5 204,407 6,678 67.6 12,595 5.7 155,494 Yen 68.42 Yen 97.64 U.S.$ 1.21 Yen 68.37 Yen 97.54 U.S.$ 1.20 15,194 21,583 13,238 (587) 84.2% Note: U.S.$1=Yen 81, for convenience only. 10.2 6.3 - 20,264 19,747 12,506 (314) 81.8% Change 9.0 5.7 - 250,173 243,790 154,395 (3,877) - 3,769 42.7 5,070 (1,836) (732) 273 33.4 -8.5 -5.5 -