writing style; literary style
Refers to the characteristic manner of expression in a piece of writing, including tone, rhythm, and word choice.
This author's writing style is very distinctive.
His writing style is stiff and hard to read.
Compound of 文 (ぶん, 'writing') and 調 (ちょう, 'tone, rhythm'). The combination straightforwardly yields 'writing tone' or 'style of writing'.