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令和6年(受)第2078号 損害賠償請求事件最高裁判決バンドスコア

11/10/2026

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最高裁判所第二小法廷は、2026年10月9日、著作権法上の著作物に当たらないバンドスコア(楽譜)を大量に模倣して無料でウェブサイトに公開し、広告収入を得ていた行為について、自由競争の範囲を逸脱した営業妨害(不法行為)に当たると判断、ウェブサイト運営会社の上告を棄却し、約1億7000万円の賠償を命じた2審判決が確定しました。
この判決について生成AIに評釈させましたのでご参照ください。
なお、生成AIによる調査・分析結果は、公開された情報だけに基づくものであり、必ずしも実情を示したものではなく、誤った情報を含む可能性があることにご留意のうえ、ご参照ください。
 
令和6年(受)第2078号 損害賠償請求事件 令和8年10月9日 第二小法廷判決
https://www.courts.go.jp/assets/hanrei/hanrei-pdf-97135.pdf
 
著作物でなくても「バンドスコア」模倣に賠償責任 最高裁初判決
10/9
https://news.yahoo.co.jp/articles/d68c9f54f5fdefdf19a493ef6377a43865b4a102
 
 
Supreme Court Judgment in Case No. 2024 (Ju) 2078: Claim for Damages
On October 9, 2026, the Second Petty Bench of the Supreme Court of Japan ruled that the practice of copying large numbers of band scores (sheet music) that did not qualify as copyrightable works under the Copyright Act, making them available free of charge on a website, and earning advertising revenue constituted interference with business beyond the bounds of free competition and therefore amounted to a tort. The Court dismissed the final appeal brought by the website operator, and the appellate court’s judgment ordering the company to pay approximately ¥170 million in damages became final.
I have used generative AI to prepare a case commentary on this judgment for your reference.
Please note that the research and analysis produced by generative AI are based solely on publicly available information, do not necessarily reflect the actual circumstances, and may contain inaccuracies. Please bear these limitations in mind when reviewing the commentary.

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