Translation guide
In Japanese, the term for a removable paper cover on a book is ブックカバー or カバー, while the printed paper flap attached to the book itself is called カバー or ジャケット. The word ブックジャケット is less common.
The learner wants to refer to the loose paper cover that wraps around a book, often used for protection or decoration.
The most common and natural term for a removable book cover, especially the kind provided by bookstores or libraries.
The learner wants to refer to the paper flap that is part of the book's binding, often with artwork and summary.
Used for the dust jacket that is attached to the book. Context distinguishes it from the removable cover.
この本にブックカバーをかけてもらえますか？
Could you put a book jacket on this book?
A shorter, common term for a book jacket, often used in everyday conversation.
カバーが破れてしまった。
The book jacket got torn.
Less common; may be understood but sounds like a direct translation from English. Prefer ブックカバー or カバー.
This term is not widely used in Japanese; ブックカバー is the standard.
ブックジャケットを集めています。
I collect book jackets.
この本のカバーデザインが素敵ですね。
The design of this book jacket is lovely.
Sometimes used for the dust jacket, especially in publishing contexts, but less common than カバー.
ジャケットのイラストが気に入った。
I liked the illustration on the book jacket.