ポップ ジャンル の概要
Pop music (a term that originally derives from an abbreviation of "popular") is a genre of popular music, which originated in its modern form in the 1950s, deriving from rock and roll. The terms "popular music" and "pop music" are often used interchangeably, even though the former is a description of music which is popular (and can include any style).
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On Discogs, the Pop genre "can and should be used with any other genre to tag items as being mainstream, chart orientated works."