AnimatorPerson who made or animated the PV. Required for Music PV and Drama PV song types.
Arranger is the person handling the instruments and producing the music. Most of the time this is related to remixes where the remixer is generally credited with the arranger role, but sometimes for original songs the roles for composition and arrangement (music production) are divided as well.
The person who created the song. Most of the time for original songs, the composer and arranger are the same person, but not always.
DistributorMostly for albums, the person or group who distributes the album, either physically (such as selling at an event), or electronically (sells the digital copies).
IllustratorPerson who made the illustration for either a PV or album cover. Also booklet illustrations.
InstrumentalistA person playing an instrument, usually a physical instrument such as piano or guitar.
Person who wrote the lyrics.