light music; popular music
Refers to easy-listening, popular, or non-classical music, often contrasted with クラシック (classical music). Common in school club names (軽音楽部).
He joined the light music club in high school.
This program introduces the latest popular music.
I joined the high school's light music club and formed a band.
When I want to relax, I make a point of listening to light music.