This question's explanation and your answers so far.
生成AIを用いた生成物の取扱いに関して，既存の著作物の著作権者から許諾を得ることが必要となる可能性のあるものだけを，全て挙げたものはどれか。 a 好みのアーティストの楽曲に似た音楽が得られるように生成AIを用いて楽曲を生成し，その楽曲をインターネット上にアップロードし，無料で公開した。 b 好みのアーティストの楽曲に似た音楽が得られるように生成AIを用いて楽曲を生成し，その楽曲を自分のPC上に保管し，個人で視聴した。 c 生成AIで音楽を生成したところ，偶然好みのアーティストの楽曲に似た音楽が生成できたので，自分のPC上に保管し，個人で視聴した。
正解 For copyright infringement to be established, two conditions must both be met: “similarity” (resembling an existing work) and “reliance” (being created based on an existing work). In addition, there is an exception: “reproduction for private use” (Article 30 of the Copyright Act), in which one enjoys the work only by oneself, requires no permission. Case a was generated with the intent to “resemble a favorite artist’s song,” so it has both reliance and similarity, and furthermore the music is uploaded to the Internet and made freely available to the public. Providing it to the public goes beyond the scope of private use, so obtaining permission from the copyright holder of the existing song may be necessary. Only a may require permission, so “ア,” which lists only a, is the correct answer.
It is wrong because it includes b in addition to a. Although b has the intent to resemble an existing song (reliance), the output is merely stored on one’s own PC and listened to personally, which falls under “reproduction for private use” in Article 30 of the Copyright Act and requires no permission. Only a may require permission, so including b is incorrect.
It is wrong because it lists all of a, b, and c. b is reproduction for private use and requires no permission; c is a piece of music that happened to resemble one by coincidence, so it lacks reliance and does not constitute copyright infringement (and is also only listened to personally) — neither requires permission. Only a may require permission.
It is doubly wrong: it omits a, which may require permission, and lists b and c, which do not. b is reproduction for private use, and c is a coincidental resemblance with no reliance — neither requires permission. The one that may genuinely require permission is a, which involves making the work public.