noun
night work; late-night work
Refers to work performed during late-night hours, often in legal or labor contexts (e.g., under the Labor Standards Act).
深夜業には割増賃金が支払われる。
A premium wage is paid for night work.
Compound of 深夜 (shin'ya, 'late night') and 業 (gyō, 'work' or 'business').