* Radwimps
* Rainstick Orchestra
* Raise[disambiguation needed]
* Raphael
* RC Succession
* Rei Harakami
* Remioromen
* Rentrer en Soi
* Rice
* Rie fu
* Rina Aiuchi
* Rip Slyme
* Riyu Kosaka
* RIZE
* ROACH
* The Rodeo Carburettor
* Rolly
* Room#Number
* The Roosters
* Rovo
* Ruins
* Run&Gun
* Ruppina
* Rurutia
* Riddim saunter