Publishers – J
- J. Lingen
- J. Maurer Edition Musicale
- J. Schuberth & Co.
- JAKKS Pacific Inc.
- James Pass
- Jan Bosveld Music Publications
- Jan Zwart Uitgeverij
- Janssen
- Jasemusiikki
- Jawbone Press
- Jazzwise Publications
- Jeeves Music Limited
- Jetelina Musik Verlag
- Joel Rothman Publications
- Joep Wanders
- Joh. Siebenhner Musikverlag
- Johannes de Heer
- Johannes Kansy
- John Cage Trust
- John Denver Music
- John Hornby Skewes & Co
- John Savage
- John Wiley & Sons
- Jolly Learning
- Jongbloed
- Joost Schellingerhout
- Jot a Note Publications
- Jumib. B.V.
- Just Accord Music
- Just Flutes Edition
- Just Music
- JVB Fingerplacements