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TDK Corporation is a major Japanese multinational electronics company founded on December 7, 1935, in Tokyo by Kenzo Saito, originally established as Tokyo Denki Kagaku Kōgyō K.K. The company initially specialized in manufacturing ferrite, a magnetic material, before expanding into magnetic tape and cassette technologies during the 1950s and 1960s, becoming a household name in the audio recording media industry. TDK was particularly renowned for their high-quality cassette tapes and recording media that became synonymous with superior audio recording quality worldwide. However, in 2007, TDK sold their recording media business to Imation and transitioned their focus to electronic components, power supplies, and sensors for various industrial applications. Today, TDK operates as a major supplier of electronic components rather than consumer audio products, serving industries including automotive, industrial, and information communication technology. Listed on the Tokyo Stock Exchange as part of the Nikkei 225 index, TDK continues active global operations with their motto 'Contribute to culture and industry through creativity,' though their direct involvement in consumer audio has significantly diminished since selling their media division.