Japan Employment Contracts Explained: Fixed-Term, Open-Ended, and the Five-Year Rule

2026年9月1日

Fixed-Term or Open-Ended? How Employment Contracts Work in Japan

The most important difference is simple: a fixed-term contract has a stated end date, while an open-ended contract does not. However, an open-ended contract does not automatically make you a seishain (regular employee), and a fixed-term worker does not automatically have fewer rights in every area.

For foreign workers, the practical questions are whether the employer intends to renew the contract, what happens at the end date, which benefits apply, and whether the job remains compatible with your status of residence.

Quick guide:

Check the contract period and renewal terms before signing.
Do not assume muki koyō—open-ended employment—means promotion to seishain.
After fixed-term contracts with the same employer run for more than five years through renewals, you may acquire the right to request conversion to an open-ended contract.
Contract type alone does not decide pay, bonuses, duties, working hours, or benefits.
Immigration permission and employment-contract duration are separate matters.

This guide is for international students entering full-time employment, workers comparing job offers, and foreign residents approaching a contract renewal. It explains the national rules current as of August 22, 2026. A collective agreement, company work rules, or an individual contract may provide better terms.

TOC

The real distinction is the end date—not the job title

A Japanese job title can be misleading, so start with the written contract rather than the label used in a recruitment advertisement.

A fixed-term employment contract is called yūki rōdō keiyaku (有期労働契約). It may run for six months, one year, or another specified period. When that period ends, the contract normally ends unless it is renewed.

An open-ended employment contract is muki rōdō keiyaku (無期労働契約). It has no predetermined final date. Employment continues until the employee resigns, the parties agree to end it, retirement rules apply, or the employer lawfully terminates it.

“Open-ended” and “regular employee” are not synonyms

Seishain (正社員), usually translated as “regular employee,” is a company employment category. Muki describes only the absence of a contract end date.

A person may therefore be:

a regular employee on an open-ended contract;
a limited regular employee whose duties, hours, or work location are restricted;
an open-ended contract employee who is not classified as seishain; or
a fixed-term employee working full-time hours alongside regular employees.

This matters because conversion from fixed-term to open-ended employment does not, by itself, guarantee a new salary table, bonus, retirement allowance, promotion track, or broader job security associated with a company’s regular-employee category.

Before accepting an offer described as “permanent,” ask the employer to identify both:

whether the contract has an end date; and
the company employment category that will apply.

What changes in daily working life

The contract type mainly changes how employment can end. Other conditions must be checked separately.

Contract duration and renewal

A fixed-term contract should state its starting and ending dates. Under the national rules, the maximum term is generally three years, although terms of up to five years are allowed in certain cases, including contracts with workers aged 60 or older and some workers with specified professional expertise.

Your written conditions should also show:

whether renewal is possible;
the factors used to decide renewal;
any maximum number of renewals; and
any upper limit on total contract duration.

“Renewal possible” is not the same as a promise to renew. Look for the actual decision factors, such as workload, performance, ability, attendance, the company’s financial position, or progress on a project.

An open-ended contract has no renewal cycle. That removes the risk of employment ending simply because a stated date arrives, but it does not make dismissal impossible.

Ending employment

An employer cannot freely dismiss an open-ended employee. A dismissal that lacks objectively reasonable grounds and is not considered socially acceptable may be invalid. Separate rules generally require 30 days’ advance notice or payment in place of some or all of that notice, subject to legal exceptions.

A fixed-term contract works differently at its end and during its term:

During the contract: an employer generally needs unavoidable circumstances to dismiss the worker before the stated end date. The standard is stricter than for an ordinary dismissal under an open-ended contract.
At the end date: the contract normally expires unless renewed.
After repeated renewals: non-renewal may be restricted when the arrangement effectively resembles open-ended employment or the worker has a reasonable expectation of renewal.

For workers whose fixed-term contracts have been renewed at least three times, or who have worked continuously for more than one year, the employer generally must give 30 days’ notice when declining to renew, subject to the applicable non-renewal standards.

ここがポイント: A fixed-term contract may offer stronger protection against dismissal in the middle of its term, yet still expose the worker to non-renewal at the end. An open-ended contract removes that scheduled end date but does not guarantee a particular title, salary, or career track.

Resigning yourself

An employee on an open-ended contract can generally give notice of resignation, with the Civil Code providing a basic two-week rule for an employment relationship without a fixed term. In practice, check the company’s shūgyō kisoku (就業規則, work rules) and follow a reasonable notice procedure where possible.

Leaving a fixed-term contract early can be more complicated. A worker normally needs an unavoidable reason to end it before expiry, although special rules can apply after the first year of a contract longer than one year. If you need to leave early, review the contract and seek advice before assuming that the same resignation rule applies.

Pay and benefits do not follow automatically from the contract label

A fixed-term worker can receive lower, equal, or sometimes higher pay than an open-ended colleague. The lawful answer depends on the actual duties and the purpose of each part of the compensation package—not simply the contract name.

Check these items one by one:

basic salary and how raises are decided;
overtime rates and fixed-overtime clauses;
bonuses, or shōyo (賞与);
retirement allowance, or taishokukin (退職金);
housing, family, commuting, and position allowances;
paid leave and other leave programs;
training and promotion eligibility;
social-insurance enrollment; and
access to cafeterias, changing rooms, employee housing, or other facilities.

Japan’s Part-Time and Fixed-Term Employment Act prohibits unreasonable differences in treatment between covered part-time or fixed-term workers and regular workers employed by the same employer. The comparison considers the content and responsibility of the job, the range of possible transfers or role changes, and other relevant circumstances.

A difference is not automatically unlawful, but “you are a contract employee” is not a complete explanation either. A fixed-term worker may ask the employer to explain differences in treatment and their reasons. The employer must not disadvantage the worker merely for requesting that explanation.

A major update takes effect on October 1, 2026

As of the publication date of this guide, revised equal-pay rules have been announced but are not yet in force. From October 1, 2026, employers must tell newly hired part-time and fixed-term workers that they may request an explanation of differences in treatment.

The revised national guideline also expands or clarifies examples concerning matters such as bonuses, retirement allowances, family allowances, and benefits for workers whose continued employment can reasonably be expected. This does not mean every fixed-term employee automatically receives identical benefits. It means employers must assess each difference according to the purpose of the benefit and the worker’s duties, responsibilities, expected continuity, and other relevant facts.

If you sign or renew a contract around October 2026, ask for the updated written notice and compare every compensation item—not only monthly salary.

How the five-year open-ended conversion rule works

A worker does not automatically become open-ended after five years. The rule gives an eligible worker the right to apply for conversion.

Under Article 18 of the Labor Contract Act, the right generally arises when fixed-term contracts with the same employer have been repeatedly renewed and their total duration exceeds five years. The worker applies during the contract in which the right exists, and the employer is deemed to accept the application. The open-ended contract starts after the current fixed term ends.

A simplified example:

Contract 1: April 1, 2021 to March 31, 2022
Contracts renewed annually with the same employer
Contract 6: April 1, 2026 to March 31, 2027
The total contracted period now exceeds five years
The worker may apply during Contract 6
Open-ended employment begins on April 1, 2027

The exact calculation can change with contract dates, gaps between contracts, and special statutory exceptions. Certain highly skilled professionals working on qualifying projects and some workers re-employed after mandatory retirement may be covered by special arrangements when the employer has completed the required process.

What conversion changes—and what it does not

The conversion removes the end date. Unless separate terms are agreed or company rules provide otherwise, other working conditions generally continue from the fixed-term contract.

Conversion therefore does not automatically provide:

seishain status;
a pay increase;
a bonus or retirement allowance;
a managerial or promotion track;
unrestricted duties or transfers; or
a longer immigration period of stay.

Before applying, request the employer’s rules for muki tenkan (無期転換, open-ended conversion). Check the post-conversion salary, duties, work location, retirement age, benefits, and applicable work rules.

Written information employers must provide

Since April 2024, employers have had additional disclosure duties. All workers must be told the possible scope of changes to their workplace and duties. Fixed-term workers must also receive information about renewal limits when the contract is signed or renewed.

When the open-ended conversion right arises, the employer must disclose:

that the worker has an opportunity to apply for conversion; and
the working conditions that will apply after conversion.

The employer must also endeavor to explain matters considered when balancing those conditions with the conditions of regular employees.

Keep every rōdō jōken tsūchisho (労働条件通知書, notice of working conditions) and signed contract. The sequence of dates and renewal terms may become important later.

A contract checklist before you sign or renew

The safest comparison uses written documents from both offers. Do not compare only “annual salary” and “permanent versus contract.”

1. Find the exact end date

Look for keiyaku kikan (契約期間, contract period) and kikan no sadame (期間の定め, whether a term is specified). If there is an end date, write it in your calendar well before the renewal decision.

2. Read the renewal language

Find keiyaku kōshin (契約更新, contract renewal) and kōshin jōgen (更新上限, renewal limit). Ask these concrete questions:

Is renewal automatic, possible after assessment, or unavailable?
When will the employer make the decision?
Is there a maximum number of renewals?
Is there a maximum total employment period?
Who should receive a renewal request from the worker?

If an employer introduces or reduces a renewal limit after the original contract was made, the employer is required to explain the reason in advance under the applicable standards.

3. Compare the whole compensation package

Calculate guaranteed annual cash separately from possible bonuses. Then compare commuting costs, housing support, retirement benefits, paid leave, insurance deductions, and unpaid gaps between contracts.

A higher monthly rate on a one-year contract may be less valuable if the job has no bonus, no retirement allowance, and uncertain renewal. Conversely, a fixed-term role may suit a worker who wants a defined project, specialized experience, or a planned departure date.

4. Check duties and transfer expectations

Read gyōmu naiyō (業務内容, duties) and shūgyō basho (就業場所, workplace), including the stated scope of possible changes. Some regular-employee tracks expect transfers or broad role changes; some open-ended or fixed-term roles limit both.

The more secure-looking title may carry wider obligations. Ask whether the employer can transfer you to another prefecture, change your department, or substantially alter your duties.

5. Ask which work rules apply

Companies may maintain different work rules for regular employees, fixed-term employees, and open-ended converted employees. Request access to the version that applies to you.

Check especially:

retirement age;
disciplinary rules;
resignation procedure;
salary review timing;
leave beyond statutory minimums;
conversion or regular-employee application systems; and
rules for side jobs.

Foreign residents must check immigration status separately

Japanese labor protections generally apply to workers regardless of nationality, but permission to work depends on immigration status and permitted activities.

A one-year employment contract does not necessarily produce a one-year period of stay, and an open-ended contract does not guarantee immigration renewal. Immigration authorities make their own assessment based on the relevant status, activities, supporting documents, and circumstances.

Before changing jobs or duties, check:

whether the new activities fall within your current status of residence;
whether a change of status is required;
whether you must notify the Immigration Services Agency after leaving or joining an affiliated organization; and
whether a gap in qualifying activity could affect your situation.

Rules differ by status. A permanent resident has no employment-activity restriction of this kind, while a student normally needs permission for activities outside their status and must observe the applicable working-hour conditions. Holders of employer-linked work statuses should use the Immigration Services Agency’s guidance or seek qualified advice for their own case.

Common mistakes that create avoidable problems

Most disputes begin with an assumption that was never confirmed in writing.

Mistaking muki for seishain. Ask about both the contract duration and employment category.
Treating “renewal possible” as guaranteed renewal. Read the criteria and any renewal limit.
Waiting until the last week to discuss renewal. Ask for the decision schedule several months before expiry.
Assuming conversion after five years is automatic. An eligible worker generally must apply.
Expecting all conditions to improve after conversion. Review the post-conversion terms before applying.
Comparing only monthly pay. Include bonuses, allowances, retirement benefits, unpaid intervals, and transfer obligations.
Throwing away old contracts. Keep every notice, renewal agreement, email, and payslip.
Assuming a new job title settles immigration permission. Immigration examines actual activities, not only the employer’s English title.

Where to get help

Start by asking the employer for written clarification. Useful people may include HR, the person named as the consultation contact, or a labor union if one is available.

For independent support, the Ministry of Health, Labour and Welfare provides foreign-language consultation services. Labor Standards Inspection Offices handle matters within labor-standards law, while Prefectural Labour Bureaus can advise on employment-contract disputes and treatment differences. Their roles are not identical, so describe the problem clearly when contacting them.

Bring or save copies of:

every contract and working-conditions notice;
the applicable work rules;
recruitment advertisements;
renewal emails or messages;
payslips and attendance records; and
a dated timeline of what the employer and worker said.

For immigration questions, use the Immigration Services Agency’s official consultation channels. Labor offices cannot decide whether a particular job is permitted under your status of residence.

What to check next

The better contract is not determined by one label. A fixed-term role may provide clear project boundaries or specialist pay; an open-ended role removes the scheduled expiry date. The decisive details sit in the renewal clause, compensation rules, duties, transfer range, and work rules.

Before your next signature:

confirm whether there is an end date;
identify the renewal limit and decision criteria;
ask whether open-ended conversion changes anything besides duration;
compare each pay and benefit item in writing; and
confirm that the actual duties fit your immigration status.

Workers signing or renewing after October 1, 2026 should also check for the new notice explaining their right to request reasons for treatment differences. That document will not answer every question, but it gives you a concrete place to begin the comparison.

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