noun
person in charge; responsible person
Refers to the individual who has primary responsibility for a task, project, or department. Often used in business or organizational settings.
この件の主務は田中さんです。
The person in charge of this matter is Mr. Tanaka.
noun-modifying (irregular)
competent; responsible
Prenominal use describing an authority, minister, or official who has jurisdiction or competence over a specific area. Common in legal and administrative contexts.
主務大臣がその政策を担当する。
The competent minister is in charge of that policy.