Supplementary Data 1 Current status and future outlook of manufacturing sites in Thailand Company name City Current status and future outlook Rare-earth magnets, recording media, and sensors Drainage of flood water in the premises as well as cleaning and disinfection has been completed, and repair work has now been started. ＜Future outlook＞ ・Production of magnets is expected to resume in April 2012. ・The timing to resume production of sensors is yet to be adjusted. ・Others are yet to be adjusted. TDK Thailand Co., Ltd Rojana Plant TDK Thailand Co., Ltd Wangnoi Plant Rare-earth magnets applied products Production facilities have been set up and normal production resumed on December 16 last year. Magnecomp Precision Technology Public Co.,Ltd (Main plant) Wangnoi Plant HDD suspensions Operation resumed partially on November 7 last year, and now normal production has been resumed. HDD suspensions Drainage of flood water in the premises as well as cleaning and disinfection has been completed. ＜Future outlook＞ ・Production line is being set up on the 2nd floor of the Plant, and production will resume at the end of January 2012. ・Shipment starts from end of January 2012. Magnecomp Precision Technology Public Co.,Ltd (Branch plant) Rojana Plant 2 Quarterly Sales and Operating Income by Segment FY March 2011 Yen billions Net Sales Capacitors 38.0 37.7 35.2 34.5 145.4 36.1 34.2 3Q 30.6 Inductive Devices 32.1 33.6 32.6 31.9 130.2 32.9 31.4 28.6 Other Passive Components 34.6 37.5 39.3 38.6 150.0 32.8 34.4 30.4 104.7 108.7 107.1 105.5 425.6 101.7 99.9 89.5 Recording Devices 71.7 65.3 63.0 57.5 257.5 55.2 53.3 42.0 Other Magnetic Application Products 28.6 26.9 27.7 27.7 111.0 27.4 31.2 29.8 Magnetic Application Products 100.3 92.2 90.8 85.2 368.5 82.7 84.5 71.8 Other 17.0 19.3 22.0 23.4 81.7 22.4 26.0 30.5 221.9 220.3 219.9 213.6 875.7 206.8 210.4 191.8 Passive Components 6.3 7.3 6.2 4.8 24.5 3.8 1.3 1.5 Magnetic Application Products 16.1 12.5 11.5 6.8 46.9 7.6 8.8 6.4 Other 1.0 1.7 2.0 1.0 5.7 1.5 1.7 2.5 Sub-total 23.3 21.5 19.7 12.6 77.1 12.8 11.8 10.4 Corporate and Eliminations (3.1) (4.5) (2.6) (3.2) (13.3) (7.2) (3.7) (3.4) 17.2 9.4 63.8 5.6 8.1 7.1 Passive Components Total Operating Income Total Ex-rate ￥/USD ￥/EURO 1Q 2Q 20.2 3Q FY March 2012 17.0 4Q Total 1Q 2Q 92.01 85.88 82.65 82.31 85.73 81.74 77.96 77.35 117.03 110.67 112.20 112.66 113.12 117.62 110.42 104.30 4Q Total 3 Sales transition by market Quarterly results in FY March 2011 and in FY March 2012 23.1% 24.0% 25.2% 27.8% 26.7% 25.6% 24.8% 12.7% 12.0% 12.5% 15.4% 12.7% 16.9% 17.0% 13.3% 14.1% Industrial Equipment and others Car Electronics 17.6% 16.9% 16.0% 16.8% 19.6% Communications 48.7% 47.0% 44.6% 42.0% 44.6% 43.6% 38.7% 1Q of FY2011 2Q of FY 2011 3Q of FY2011 4Q of FY 2011 1Q of FY2012 2Q of FY2012 3Q of FY2012 Home Information Appliances Quarterly results in FY March 2011 and in FY March 2012 Yen billions Results through 3Q in FY March 2012 155.8 , 26% 258.5 , 42% 88.4 , 15% 108.1 Home Information Appliances 103.6 98.1 89.7 92.2 Communications 74.6 1Q of FY2011 2Q of FY 3Q of 2011 FY2011 4Q of FY 2011 1Q of FY2012 2Q of FY2012 3Q of FY2012 1Q of FY2011 27.6 2Q of FY2011 3Q of FY2011 4Q of FY2011 1Q of FY2012 2Q of FY2012 3Q of FY2012 Industrial Equipment and others 59 .4 Yen billions 28.4 26.4 35.2 33.0 29.7 Yen billions 28.2 37.9 36.1 Yen billions 34.3 32.6 Car Electronics 106.2 , 17% 37.4 91.6 38.7 51 .4 26.2 55 .5 55 .3 52 .9 53 .9 48 .0 Home Information Appliances Communications Car Electronics Industrial Equipment and others 1Q of FY2011 2Q of FY2011 3Q of FY2011 4Q of FY2011 1Q of FY2012 2Q of FY2012 3Q of FY2012 1Q of FY2011 2Q of FY2011 3Q of FY2011 4Q of FY2011 1Q of FY2012 2Q of FY2012 3Q of FY2012 4 Financial Position （JPY billion） Mar End, 2011 Sep End, 2011 Dec End, 2011 Q on Q Change 1,060.9 1,049.8 1,045.9 -3.9 Total Liability 521.1 537.5 544.3 6.8 Interest-bearing Debt 245.0 268.0 281.9 13.9 Stockholders's Equity 534.3 499.2 488.1 -11.1 (comprehensive income) -218.0 -258.2 -252.1 6.2 Stockholders' Equity ratio 50.4% 47.6% 46.7% -0.9pt Total Asset 5 Expenses ＜Results through 3Q＞ (Yen billions） FY March 2011 Results through 3Q FY March 2012 Results through 3Q (2010.4.1-2010.12.31) (2011.4.1-2011.12.31) Change Yen billions % Capital expenditures 54.1 76.3 22.3 41.2% Depreciation and amortization 57.5 56.2 (1.3) -2.3% Research and development 38.9 39.4 0.5 1.2% ＜3Q Results＞ 3Q results of FY March 2011 (Yen billions） (2010.10.1-2010.12.31) 3Q results of FY March 2012 (2011.10.1-2011.12.31) Change Yen billions % Capital expenditures 20.3 22.8 2.5 12.5% Depreciation and amortization 19.7 18.8 (0.9) -4.6% Research and development 12.5 12.9 0.4 3.4% 6 7 8 Cautionary Statements with Respect to Forward-Looking Statements This material contains forward-looking statements, including projections, plans, policies, management strategies, targets, schedules, understandings and evaluations, about TDK or its group companies (TDK Group). These forward-looking statements are based on the current forecasts, estimates, assumptions, plans, beliefs and evaluations of TDK Group in light of information currently available to it, and contain known and unknown risks, uncertainties and other factors. TDK Group therefore wishes to caution readers that, being subject to risks, uncertainties and other factors, TDK Group’s actual results, performance, achievements or financial position could be materially different from any future results, performance, achievements or financial position expressed or implied by these forward-looking statements, and TDK Group undertakes no obligation to publicly update or revise any forward-looking statements after the issue of this material except as provided for in laws and ordinances. The electronics markets in which TDK Group operates are highly susceptible to rapid changes. Risks, uncertainties and other factors that can have significant effects on TDK Group include, but are not limited to, shifts in technology, fluctuations in demand, prices, interest and foreign exchange rates, and changes in economic environments, conditions of competition, laws and regulations. Also, since the purpose of these materials is only to give readers a general outline of business performance, many numerical values are shown in units of a billion yen. Because original values, which are managed in units of a million yen, are rounded off, the totals, differences, etc. shown in these materials may appear inaccurate. If detailed figures are necessary, please refer to our financial statements and supplementary materials. 9