無断転載(むだんてんさい)

むだんてんさい
noun
unauthorized reproduction; reposting without permission
formallegalcommunication
1. unauthorized reproduction; unauthorized reposting; reprinting without permission
Copying and republishing someone else's content (text, images, videos, etc.) without obtaining their permission. Extremely common on Japanese websites as a warning against unauthorized sharing.
無断転載(むだんてんさい)禁止(きんし)。
Unauthorized reproduction prohibited.
この写真(しゃしん)の無断転載(むだんてんさい)はご遠慮(えんりょ)ください。
Please refrain from reposting this photo without permission.
SNSでの無断転載(むだんてんさい)が問題(もんだい)になり、著作権(ちょさくけん)侵害(しんがい)で訴(うった)えられた。
Unauthorized reposting on social media became a problem, and a copyright infringement lawsuit was filed.

Composed of 無断(むだん) (without permission) + 転載(てんさい) (reprinting, reposting). One of the most common copyright-related phrases seen on Japanese websites, blogs, and social media. Almost always appears as 無断転載(むだんてんさい)禁止(きんし) (unauthorized reproduction prohibited) or 無断転載(むだんてんさい)はご遠慮(えんりょ)ください (please refrain from unauthorized reproduction). Related: 無断(むだん)使用(しよう) (unauthorized use), 無断(むだん)複製(ふくせい) (unauthorized copying).

Related Words

Compare: 剽窃(ひょうせつ) (plagiarism)
general
Added 2026.3.23 18:26 · Revised 2026.9.4 21:29
18500/18914_mudantensai