Translation guide
A group of musicians who play rock music. In Japanese, the most common way to say this is simply ロックバンド, a direct loanword. There are also native terms like ロックグループ and more specific expressions depending on context.
The most common, everyday way to refer to a rock band in Japanese.
The standard loanword for 'rock band'. Widely understood and used in all contexts.
He is a guitarist in a rock band.
I'm going to a rock band's live show this weekend.
Also means 'rock group/band'. Slightly less common than ロックバンド but perfectly natural.
That rock group has been gaining popularity lately.
To refer to the band as a collective entity, often in a more formal or descriptive way.
Using の to connect 'rock' and 'band'. Slightly more explanatory, like 'a band that plays rock'.
They formed a rock band.