| 1946 | Katoh Seisakusho was established in Meguro-ku, Tokyo. |
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| 1957 | Katoh Electrical Machinery Co., Ltd. was established. |
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| 1967 | The company commercialized specialized hinges (hinge LSH). |
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| 1981 | The company commercialized hinges for multifunction printers. |
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| 1988 | Taiwan Katoh Corporation was established. |
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| 1994 | KEM Hong Kong Limited was established. |
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| 2002 | Shanghai KEM Co., Ltd. was established. |
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| 2006 | KEM Shenzhen Company Limited was established. |
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| 2007 | KATOH Service (Beijing) Co., Ltd. was established. |
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| 2014 | Tetsuya Kato was appointed president. |
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| 2020 | KEM (Thailand) Co., Ltd. was established. |
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