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TSMC機密情報不正取得、日本企業への教訓

25/5/2026

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2026年5月20日、半導体製造装置大手・東京エレクトロンの台湾子会社に対する有罪判決が確定しました。この事件は、世界最大のファウンドリである台湾積体電路製造(TSMC)の最先端2nmプロセス技術という「国家核心重要技術」の不正取得を巡るもので、台湾が2022年に改正した国家安全法の「経済スパイ条項」が外国企業(日系企業)に初めて適用された歴史的な判例となりました。判決では、主犯格の元TSMC社員に懲役10年が科されると共に、東京エレクトロン台湾子会社に対しても約7億6000万円の罰金が命じられました。不正を主導した元従業員への監督責任を認めたもので、企業には機密流出だけでなく不正な情報取得を防ぐ仕組みも求められています。
この件について、生成AIに、経緯を調べさせ、日本企業に必要な対策について提言させました。なお、生成AIによる調査・分析結果は、公開された情報からだけの分析であり、必ずしも実情を示したものではないこと、誤った情報も含まれていることについてはご留意されたうえで、ご参照ください。
 
Unauthorized Acquisition of TSMC Confidential Information: Lessons for Japanese Companies
On May 20, 2026, the guilty verdict against the Taiwanese subsidiary of semiconductor manufacturing equipment giant Tokyo Electron became final. The case involved the unauthorized acquisition of “National Core Critical Technology,” specifically the cutting-edge 2nm process technology of Taiwan Semiconductor Manufacturing Company (TSMC), the world’s largest semiconductor foundry. It became a historic precedent as Taiwan’s “economic espionage provisions” under the National Security Act, revised in 2022, were applied for the first time to a foreign company (a Japanese-affiliated company).
In the ruling, the former TSMC employee identified as the principal offender was sentenced to 10 years in prison, while Tokyo Electron’s Taiwanese subsidiary was also fined approximately ¥760 million. The court recognized the company’s supervisory responsibility over the former employee who led the misconduct, signaling that companies are now required not only to prevent the leakage of confidential information, but also to establish mechanisms to prevent the improper acquisition of such information.
Regarding this matter, I asked generative AI to investigate the background of the case and provide recommendations on the measures Japanese companies should implement. Please note that the investigation and analysis produced by generative AI are based solely on publicly available information, may not necessarily reflect the actual circumstances, and may contain inaccuracies. Please keep this in mind when reviewing the material.

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