Translation guide
Describes an unauthorized reproduction of copyrighted material, such as software, media, or documents. Japanese expressions vary by formality and context, from legal terms to casual slang.
To refer to an illegally copied or distributed digital product, like software, movies, or music.
Literally 'pirate edition', this is the standard term for pirated copies of software, movies, music, etc. Widely understood and neutral in tone.
このソフトは海賊版です。
This software is a pirated copy.
海賊版のDVDが市場に出回っている。
Pirated DVDs are circulating in the market.
Means 'illegal copy'. A straightforward term often used in legal or formal contexts. Can refer to any unauthorized duplication.
違法コピーは著作権侵害です。
Illegal copying is a copyright infringement.
Literally 'copy goods', often used for counterfeit physical items, but can also refer to copied media. Less specific than 海賊版.
これはコピー品だから安い。
This is a copy, so it's cheap.
Slang term derived from 'warez', used in online communities for cracked software or pirated content. Very informal.
割れソフトを使うのは危険だ。
Using cracked software is dangerous.
To describe an illegally photocopied or reproduced physical document, book, or other printed material.
Means 'unauthorized reproduction'. Commonly used in legal contexts for books, documents, and other copyrighted printed materials.
この本の無断複製は禁止されています。
Unauthorized reproduction of this book is prohibited.
Means 'illegitimate copy'. Used for both digital and physical unauthorized copies. Slightly formal.
不正コピーされた書類が見つかった。
Illegally copied documents were found.
To refer to fake physical products that illegally copy a brand or design, such as clothing, accessories, or electronics.
General term for 'fake' or 'counterfeit' goods. Not limited to copies, but commonly used for illegal imitations.
このバッグは偽物だ。
This bag is a fake.
Means 'imitation goods'. Often used for counterfeit luxury items. Can be neutral or negative depending on context.
Slang for 'knockoff' or 'rip-off'. Very casual and often used humorously.
それ、パチモンじゃない？
Isn't that a knockoff?
The direct translation '不法コピー' is not commonly used. Stick to the terms above for natural Japanese.
海賊版 specifically refers to pirated editions of media/software, while 違法コピー is a broader term for any illegal duplication. Use 海賊版 for movies, music, games; use 違法コピー for documents or when emphasizing the illegality.
模造品の時計が押収された。
Counterfeit watches were seized.