クローズドショップ

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Meanings

1

noun

closed shop

A workplace where union membership is a condition of employment. Used in labor relations contexts.

クローズドショップ

Variant with interpunct; less common but seen in some texts.

クローズド・ショップ

ユニオンショップ
A union shop requires employees to join the union after being hired, whereas a closed shop requires union membership before hiring.
オープンショップ
An open shop does not require union membership as a condition of employment, opposite of a closed shop.

Borrowed from English 'closed shop', referring to a workplace where union membership is mandatory for employment.