Usage patterns
〈人〉は作曲家になるto become a composer
He graduated from a music university and became a composer.
作曲家として活躍するto be active/successful as a composer
She is active as a composer of film music.
〈人〉は作曲家に曲を依頼するto commission a piece from a composer
The orchestra commissioned a new piece from a famous composer.
