Fixed-Term vs Indefinite Employment in Japan: Risk Comparison

For foreign companies expanding into Japan, one of the earliest HR decisions is whether to hire employees on a fixed-term or indefinite-term basis. The instinct is often to use fixed-term contracts — they seem to offer flexibility and an easy exit if things do not work out.

In Japan, it does not. A fixed-term contract does not give an employer the freedom to end the employment relationship simply because the term has expired. Japanese labor law places strict limits on how fixed-term contracts can be used and ended. Understanding these rules before designing your employment structure is not optional — it is foundational.

This article explains the key legal differences between fixed-term and indefinite employment in Japan, highlights the risks that foreign employers most commonly overlook, and provides a practical checklist for companies currently using or considering fixed-term arrangements.

Related column:

Drafting Employment Contracts in Japan: Must-Have Clauses and Pitfalls

Hiring Employees in Japan: Legal Considerations for Foreign Companies

Fixed-Term vs Indefinite Employment: The Key Legal Differences in Japan

Under Japanese law, an indefinite-term employment contract (mukiroyō keiyaku) has no scheduled end date. The employment relationship continues until the employee resigns, is lawfully dismissed, or reaches a mandatory retirement age set by the employer. Fixed-term contracts (yūki rōdō keiyaku), by contrast, are limited to a specified period — typically six months or one year, with periods of up to three years permitted in certain circumstances.

The legal framework distinguishing these two types is primarily found in the Labor Contract Act (Rōdō Keiyaku Hō) and the Labor Standards Act (Rōdō Kijun Hō).

At a structural level, the key differences are:

Termination

Indefinite contracts require lawful grounds for dismissal. Fixed-term contracts theoretically expire at the end of the term — but as explained below, this distinction is narrower in practice than it appears.

Term limits

Fixed-term contracts are generally capped at three years per contract, with a maximum of five years for highly skilled specialists and employees aged 60 or over.

Mandatory disclosures

For both types, employers must provide written notification of employment conditions at the time of hire. For fixed-term contracts, the renewal criteria and conditions must also be disclosed in writing.

In most countries, the distinction between a fixed-term and an indefinite contract is clear at the point of exit: one expires, the other requires a dismissal process. In Japan, that distinction is far less reliable — and understanding why is the starting point for managing employment risk here.

The “Expectation Doctrine” — Why Fixed-Term Doesn’t Mean Easy to End

This is where many foreign employers encounter their most costly surprise. A common pattern: a foreign subsidiary hires someone on a one-year fixed-term contract, renews it once or twice without much thought, and then decides — perhaps due to restructuring or a performance issue — not to renew again. The HQ legal team signs off on the non-renewal, assuming that because the contract has an end date, no further process is required. In Japan, that assumption is frequently wrong.

Under Article 19 of the Labor Contract Act, a non-renewal (koyaishi) — the employer’s decision not to renew a fixed-term contract at the end of its term — can be challenged by the employee and treated by courts as equivalent to a dismissal. This means the non-renewal is subject to the same standards of objective reasonableness and social acceptability that apply to indefinite-term terminations.

This doctrine of reasonable expectation (kōshin kitaiken) applies in two principal situations:

• The contract has been renewed multiple times, such that a reasonable expectation of continued employment has arisen.
• The circumstances at renewal — the employer’s conduct, oral assurances, or the nature of the work — gave the employee reasonable grounds to believe renewal would occur.

In practice, courts examine factors including the number of renewals, the consistency of renewal offers, whether the employer used language suggesting ongoing employment, and whether the employee’s role was substantively different from permanent staff. There is no bright-line threshold — two renewals can be sufficient in some cases.

For foreign companies, the practical consequence is clear: a fixed-term contract that has been renewed without careful documentation of its temporary nature may be legally indistinguishable from an indefinite contract when the employer tries to end it.

The threshold at which expectation rights arise has not been codified by statute and continues to be shaped by case law. The analysis above reflects general judicial trends as of the date of drafting and should be verified against current precedent.

Related: Employee Dismissal and Labor Law Risks for Foreign Employers in Japan

The 5-Year Conversion Rule: What Employers Often Miss

Article 18 of the Labor Contract Act introduced an automatic conversion mechanism commonly known as the “5-year rule.” Under this provision, when the same employee has worked under one or more fixed-term contracts with the same employer for a cumulative total exceeding five years, the employee acquires the right to request conversion to an indefinite-term contract. The employer cannot refuse this request.

Key operational points:

• The five-year threshold is calculated cumulatively across all fixed-term contracts with the same employer, not per individual contract.
• A gap of six months or more between contracts generally resets the count, provided the preceding cumulative period was under five years.
• Once the right arises, the employee may exercise it at any time during the final fixed-term period.
• The resulting indefinite-term contract takes effect from the start of the next contract period following the request.

Where foreign companies frequently run into difficulty is in failing to track cumulative contract durations, particularly when employees are managed across different HR systems or entities. A fixed-term employee who has quietly crossed the five-year threshold acquires conversion rights regardless of whether the employer intended or noticed this.

Some employers have attempted to avoid the conversion mechanism by inserting non-renewal clauses before the five-year mark, or by allowing contracts to lapse and rehiring after a gap. Courts and the Ministry of Health, Labour and Welfare have scrutinised such approaches carefully. Conduct designed primarily to defeat conversion rights creates significant legal exposure.

Five-year calculation in cases involving corporate restructuring, business transfers, or changes in entity type may require case-specific legal analysis. Whether a particular non-renewal or gap strategy constitutes an abuse of right under the Labor Contract Act is a highly fact-specific question. Independent legal review is strongly recommended before implementing such approaches.

When Fixed-Term Makes Sense — and When It Creates More Risk

Fixed-term employment is not inherently problematic. The legal risks arise primarily from misuse — applying the structure without understanding its implications, or treating it as a proxy for at-will employment when Japanese law does not permit this.

Fixed-term contracts are generally appropriate in the following scenarios:

• Project-based work with a defined end date, where the basis for the fixed term is genuinely tied to the project’s completion.
• Seasonal or cyclical demand that is clearly temporary and documented as such.
• Replacement cover for an employee on extended leave, where the need is inherently time-limited.

Fixed-term contracts carry elevated risk in the following situations:

• The role is functionally equivalent to that of a permanent employee performing ongoing work.
• The contract has already been renewed once or more without explicit documentation of the temporary nature of the arrangement.
• The employer plans to non-renew on the basis of performance, without having maintained adequate documentation of performance concerns.
• There is no genuine operational reason for the fixed-term structure — it was chosen because the employer assumed, based on experience in other countries, that a time-limited contract would mean a simpler exit in Japan.

The judgment call is not simply “fixed-term or indefinite” but rather: given this role, this employee, and this operational context, which structure creates fewer legal risks and clearer expectations going forward?

Fixed-Term Employment Checklist for Employers in Japan

For companies currently using or considering fixed-term contracts in Japan, the following checklist covers the key compliance and risk management points:

• Legitimate basis for the fixed term. Is there a documented operational reason — project end date, leave cover, seasonal demand — that justifies the fixed-term structure?
• Written contract with clear terms. Does the contract specify the term, renewal conditions (if any), and the circumstances under which it will or will not be renewed?
• Renewal tracking. Is there a system for tracking how many times each fixed-term employee has been renewed and the cumulative duration of their employment?
• 5-year threshold monitoring. Is there a mechanism to identify employees approaching the five-year cumulative threshold under Article 18 of the Labor Contract Act?
• Non-renewal procedures. If a contract is not to be renewed, has appropriate advance notice been given — at least 30 days prior to the end of the term where the contract has been renewed at least once?
• Documentation of renewal decisions. Are renewal and non-renewal decisions documented in writing, including the rationale, and communicated to the employee?
• Alignment with work rules. Does the company’s shūgyō kisoku (work rules) reflect the use of fixed-term employment, including renewal policies and non-renewal procedures?

The 30-day advance notice requirement applies specifically to contracts that have been renewed at least once. Requirements for contracts not previously renewed, and for contracts with very short terms, may differ and should be verified.

Conclusion

The core misunderstanding that drives most fixed-term disputes in Japan is straightforward: foreign employers arrive expecting that a contract with an end date gives them a clean exit option. Japanese law does not work that way.

Once a fixed-term employee has accumulated renewals or approaches the five-year mark, the employer’s options narrow significantly — regardless of what the contract says on paper. By the time HQ is involved, the window for a clean exit has often already closed.

Fixed-term contracts can work well in Japan when they are used for genuinely temporary roles, managed with the expectation doctrine and conversion rules in mind, and reviewed before problems develop. Used without that foundation, they tend to create more legal exposure than an indefinite contract would have from the start.

Unsure Whether Your Fixed-Term Arrangements Are Legally Sound?

If you are currently using fixed-term contracts in Japan and are unsure whether your renewal or non-renewal approach is legally sound, our team is happy to review the structure.

Contact the TSL Partners – International Business Desk