TDK Corporation 1-13-1, Nihonbashi Chuo-ku, Tokyo 103-8272 Japan Contacts; TDK Corporation(Tokyo) Corporate Communications Department +81(3)5201-7102 Michinori Katayama TDK U.S.A. Corporation Francis J. Sweeney +1(516)535-2600 TDK Marketing Europe GmbH (UK Branch) Ron Matier +44(1737)773773 FOR IMMEDIATE RELEASE TOKYO - January 31, 2005 TDK Corporation today announced its Consolidated business results prepared in conformity with accounting principles generally accepted in the United States of America (the "U.S. GAAP") for the 3rd quarter ("Qtr.") of fiscal year ("FY") 2005, the three months ended December 31, 2004, and for the nine-month-period from April 1, 2004 through December 31, 2004. 1) Summary Consolidated results (October 1, 2004 - December 31, 2004) Term Item Net sales Operating income Income before income taxes Net income Per common share : Net income / Basic Net income / Diluted The 3rd Qtr. of FY2005 The 3rd Qtr. of FY2004 Change (October 1, 2004 - December 31, 2004) (Oct. 1, 2003 - Dec. 31, 2003) (Yen millions) % (U.S.$ thousands) (Yen millions) % (Yen millions) % 174,657 16,722 100.0 9.6 1,679,394 160,788 181,851 18,139 100.0 10.0 (7,194) (1,417) -4.0 -7.8 16,718 9.6 160,750 18,712 10.3 (1,994) -10.7 12,209 7.0 117,394 14,132 7.8 (1,923) -13.6 Yen 92.35 Yen 92.29 U.S.$ 0.89 U.S.$ 0.89 Yen 106.75 Yen 106.69 (Sales breakdown) Term Product Electronic materials and components Electronic materials Electronic devices Recording devices Semiconductors & others Recording media & systems Total sales Overseas sales The 3rd Qtr. of FY2005 The 3rd Qtr. of FY2004 Change (October 1, 2004 - December 31, 2004) (Oct. 1, 2003 - Dec. 31, 2003) (Yen millions) % (U.S.$ thousands) (Yen millions) % (Yen millions) % 144,185 82.6 1,386,394 142,134 78.2 2,051 1.4 43,002 30,571 65,351 24.7 17.5 37.4 413,481 293,952 628,375 42,998 28,957 65,425 23.7 15.9 36.0 4 1,614 (74) 0.0 5.6 -0.1 5,261 3.0 50,586 4,754 2.6 507 10.7 30,472 17.4 293,000 39,717 21.8 (9,245) -23.3 174,657 125,370 100.0 71.8 1,679,394 1,205,481 181,851 135,627 100.0 (7,194) (10,257) -4.0 -7.6 74.6 Notes: 1. Consolidated results for the 3rd quarter of FY2005 and FY2004 are unaudited by independent accountant. 2. U.S.$1 = Yen 104 1/15 Consolidated 9 months Consolidated results Consolidated results (April 1, 2004 - December 31, 2004) Term Item Net sales Operating income Income before income taxes Net income Per common share : Net income / Basic Net income / Diluted The nine-month-period of FY2005 (April 1, 2004 - December 31, 2004) (Yen millions) % The nine-monthperiod of FY2004 Change (Apr. 1, 2003 - Dec. 31, 2003) (U.S.$ thousands) (Yen millions) % (Yen millions) 100.0 (4,703) 8.5 1,452 % 493,427 43,611 100.0 8.8 4,744,490 419,337 498,130 42,159 45,522 9.2 437,712 43,726 8.8 1,796 4.1 32,078 6.5 308,442 33,389 6.7 (1,311) -3.9 Yen 242.44 Yen 242.28 U.S.$ 2.33 U.S.$ 2.33 -0.9 3.4 Yen 252.02 Yen 251.96 (Sales breakdown) Term Product Electronic materials and components Electronic materials Electronic devices Recording devices Semiconductors & others Recording media & systems Total sales Overseas sales The nine-month-period of FY2005 (April 1, 2004 - December 31, 2004) The nine-monthperiod of FY2004 Change (Apr. 1, 2003 - Dec. 31, 2003) (Yen millions) % (U.S.$ thousands) (Yen millions) 406,549 82.4 3,909,125 396,486 79.6 10,063 2.5 134,038 88,082 168,684 27.2 17.8 34.2 1,288,827 846,942 1,621,962 125,300 81,408 176,848 25.2 16.3 35.5 8,738 6,674 (8,164) 7.0 8.2 -4.6 15,745 3.2 151,394 12,930 2.6 2,815 21.8 86,878 17.6 835,365 101,644 20.4 (14,766) -14.5 493,427 356,508 100.0 72.3 4,744,490 3,427,962 498,130 370,370 100.0 74.4 (4,703) (13,862) -0.9 -3.7 % (Yen millions) % Notes: 1. Consolidated results for the nine-month-period of FY2005 and FY2004 are unaudited by independent accountant. 2. U.S.$1 = Yen 104 2/15