Seishain is not a legal term, but everyone in Japan knows what it means: employed directly by the company, full time, with no end date. Everything else, from fixed-term contract staff to part-timers and agency workers, is grouped together as non-regular employment. In the 2025 Labour Force Survey, about 37.1 million of the 58.4 million employees, excluding executives, were regular and about 21.3 million were non-regular.
The status has always meant more than a contract. At large Japanese companies, seishain have traditionally received the whole package: twice-yearly bonuses, a retirement allowance, housing or family allowances, training and a place on the promotion ladder. In return they accept rotation, transfers and overtime when the employer asks. Because Article 16 of the Labour Contract Act makes dismissal so difficult, being seishain is also the main source of job security in Japan.
The law has narrowed the gap. The equal pay for equal work rules, in force from April 2020 for large employers and April 2021 for smaller ones, prohibit unreasonable differences in pay and benefits between regular and non-regular staff doing comparable work. The social distinction has proved more durable than the legal one.
What it means for a foreign employer
- A seishain offer is the baseline. For a mid-career Japanese candidate, an open-ended contract is assumed. A fixed-term offer, even a well-paid one, reads as a step down, and many will not consider it.
- Check the package, not just the contract. A permanent offer from a foreign subsidiary counts as seishain, but candidates will still compare bonus, retirement allowance and allowances with what they are leaving.
- Security cuts both ways. Seishain are hard to dismiss, which is why some foreign entities hire on fixed-term contracts first. That narrows the candidate pool, and the five-year conversion rule applies anyway.
- Employment history is read closely. Japanese hiring managers distinguish years as seishain from years as contract or agency staff on a CV.
- Don't read only half the map. By the 2010s roughly 37% of Japan's workforce sat outside seishain status: younger, more mobile and largely invisible to traditional recruitment. A talent strategy aimed only at regular employees misses a growing pool.
Sources
- Ministry of Internal Affairs and Communications, Labour Force Survey (Basic Tabulation), 2025 annual average.
- Labour Contract Act, Article 16.
- Act on Improvement of Personnel Management for Part-Time and Fixed-Term Workers, Article 8 (in force April 2020, April 2021 for smaller employers).