Japan divides its workforce in two. Seishain are hired directly, full time and open-ended. Everyone else is non-regular, a category the Labour Force Survey breaks down by what the workplace calls them. In the 2025 annual average, of about 21.3 million non-regular employees, roughly 10.3 million were paato, 4.8 million arubaito, 2.7 million contract employees, 1.6 million dispatched workers and 1.1 million shokutaku, with the rest in other forms. About 14.5 million were women.
The category grew because the law did not change for regular employees. Through the slow-growth decades after the bubble, employers kept lifetime employment for the core and built flexibility with a parallel workforce outside it. Non-regular workers typically had lower pay, no bonus or retirement allowance, little training and fixed-term contracts. By the 2010s the share had reached the high 30s as a percentage of employees and has stayed there.
Policy has since chipped at the gap. The five-year conversion rule (2013), the equal pay for equal work rules (2020 and 2021) and the expansion of social insurance to part-timers all apply to this group. The most common reason non-regular workers give in the survey is that the hours suit them, though a minority say they took it because no regular job was available.
What it means for a foreign employer
- This is the other half of the map. Senior hiring draws on one Japan: tenured, educated, slow-moving, loyal. The non-regular workforce is another: younger, more mobile, often frustrated, and largely invisible to traditional recruitment. A talent strategy that ignores it reads half the map.
- Capability hides in non-regular roles. People who left regular employment for childcare or were never offered it often work below their ability. Converting good contract or dispatched staff to regular roles is a cheap source of loyal hires.
- Pay differences need reasons. Comparable work on lower pay and fewer benefits must be justified item by item.
- Status shows on the CV. Japanese hiring managers read years outside seishain status closely. Decide whether your own screening should.
Sources
- Ministry of Internal Affairs and Communications, Labour Force Survey (Detailed Tabulation), 2025 annual average.
- Part-time and Fixed-term Employment Act, Article 8; Labour Contract Act, Article 18.