unpaid overtime by part-timers
Colloquial term blending サービス残業 (unpaid overtime) and アルバイト (part-time job). Refers to part-time workers being expected or pressured to work extra hours without pay, often in service industries.
In restaurant part-time jobs, workers are often made to work for free even during cleanup after closing.
Workplaces where unpaid overtime for part-timers is normalized are called black companies.
Blend of サービス残業 (sābisu zangyō, 'unpaid overtime') and アルバイト (arubaito, 'part-time job'). The term emerged in colloquial Japanese to describe the exploitation of part-time workers through unpaid extra hours.