noun
editor-in-chief; chief editor
A senior person responsible for a publication's editorial direction, especially in newspaper, magazine, or publishing contexts. More institutional and title-like than a general word for an editor.
彼はその新聞社で主筆を務めている。
He serves as editor-in-chief at that newspaper company.
新しい主筆の就任が発表された。
The appointment of the new editor-in-chief was announced.
Sino-Japanese compound read with on-yomi: 主 means main or chief, and 筆 is associated with writing or the pen. The compound conventionally refers to the chief person responsible for a publication's writing or editorial direction.