noun
illegal full-time union activity; union official moonlighting
Refers to a union employee who is paid by the company but works full-time on union activities without proper authorization, often in violation of labor laws.
ヤミ専従が発覚し、組合と会社の間で問題になった。
The illegal full-time union activity was uncovered and became an issue between the union and the company.
労働基準監督署がヤミ専従の実態調査を始めた。
The Labor Standards Inspection Office began an investigation into the actual state of illegal union moonlighting.
Compound of ヤミ (illegal, underground) and 専従 (full-time engagement). The term emerged in Japanese labor law contexts to describe union officials who are paid by the employer but work exclusively for the union without proper authorization.