noun
back; reverse side
General term for the back or reverse side of a physical object, document, or surface. Opposite of 表面.
See also: 表面
書類の裏面にも記入してください。
Please fill out the back side of the document as well.
コインの裏
An eagle is depicted on the reverse side of the coin.
noun
B-side; flip side
Specifically the B-side of a vinyl record or cassette tape. Often used in music contexts.
このシングルの裏面にはライブバージョンが収録されている。
The B-side of this single contains a live version.
noun
secret levels; hidden content; post-game
Video game term for hidden stages, bonus content, or post-game material. Often contrasted with the main story or surface-level content.
このゲームの裏面は本編より難しい。
The secret levels in this game are harder than the main story.