* J-Pop - Japanese pop music
* J-Rock - Japanese rock music

* Jaipongan - unpredictably rhythmic dance music from Sunda, Indonesia
* Jaliscienses - Folk music of Jalisco, Mexico, and the origin of mariachi
* Jam band
* Jam rock
* Jamana kura
* Jamrieng samai
* Jangle pop
* Japanese pop - Japanese pop music using Western structures
* Japanese rock - Japanese rock music
* Jarana
* Jariang - Cambodian folk narratives
* Jarochos - folk music from Veracruz, Mexico
* Jawaiian - Hawaiian reggae
* Jazz
* Jazz blues
* Jazz-funk
* Jazz fusion
* Jazz Metal
* Jazz rap
* Jegog - Giant Bamboo ensemble of Bali, Indonesia
* Jenkka
* Jesus music

* Jesuscore
* Jibaro
* Jig
* Jig punk
* Jing ping
* Jingle - form of music used in television commercials
* Jit
* Jitterbug
* Jive
* Joged - a generic term for various types of dance music all over Indonesia
* Joged bumbung - a popular form of joged ensemble
* Joik
* Joropo
* Jota
* J'Ouvert
* Jug band
* Juke joint blues
* Juju
* Jump blues
* Jumpstyle
* Jungle
* Junkanoo
* Juré
* Jtek